List of allied military operations of the Vietnam War (1966)

This article is a list of known military operations of the Vietnam War in 1966, conducted by the armed forces of the Republic of Vietnam, the United States and their allies.

Date DurationOperation NameUnit(s) – DescriptionLocationVC–PAVN KIAAllied KIAs
1966Operation Lightning Bug[1]USAF air interdiction operations
Jan 1 – 8Operation Marauder/Operation An Dan 564[2][3]:30[4]1st Infantry Division, 173rd Airborne Brigade, 1st Battalion, Royal Australian Regiment and ARVN operation in Plain of Reeds area of the Mekong DeltaHậu Nghĩa Province26815 US, 31 ARVN
Jan 1 – 18Operation JeffersonA combined ROK 2nd Marine Brigade and paratroops of ARVN 47th Regiment search and destroy operationPhú Yên Province
Jan 1 – 20Operation Matador III[1]1/1 Cavalry search and destroy operation along the Cambodian borderKon Tum and Pleiku Provinces
Jan 3 – 4Operation War Bonnet[1]2nd Battalion, 9th Marines and 3rd Tank Battalion search and destroy operationQuảng Nam Province
Jan 3 – 8Operation Hang Over[1]2nd Battalion, 327th Infantry Regiment search and destroy operationNinh Thuận Province
Jan 3 – 8Operation Long Lance[1]1st Battalion, 1st Marines search and destroy operationQuảng Nam Province
Jan 3 – 8Operation Quick Kick[1]1st Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Jan 8 – 14Operation Crimp[3]:30Operation by two brigades of the 1st Infantry Division and the 1st Battalion, Royal Australian RegimentHo Bo Woods, 20 km north of Cu Chi, Bình Dương Province12922
Jan 9 – 11Operation Flying Tiger VI[2]ARVN and ROK Capital Division search and destroy operationBình Định Province19211
Jan 11 – 14Operation Quick Kick II[1]1st Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Jan 11 – 17Operation Mallard[5]:40-41st Battalion, 3rd Marines and 3rd Battalion, 7th Marines search and destroy operationAn Hoa, Quảng Nam Province
Jan 12 – 25Operation Short Fuse[1]2/1 Cavalry search and destroy operationTây Ninh Province
Jan 12 – 31Operation Buckskin[3]:303rd Brigade, 1st Infantry Division search and destroy operation. Follow-up to Operation CrimpHo Bo Woods to the north and west of Cu Chi93
Jan 13 – 17Operation Matador II[1]2/1 Cavalry search and destroy operationBình Định, Kon Tum and Pleiku Provinces
Jan 13 – 17Operation Quick Hop/Operation Tyler[1]2nd Battalion, 327th Airborne Infantry Regiment search and destroy operationBình Thuận Province
Jan 15 – 17Operation Big Lodge[1]2nd Battalion, 9th Marines search and destroy operationQuảng Nam Province
Jan 15 – 19Operation Red Ball IV[1]1st Brigade, 1st Infantry Division resupply operationIII Corps
Jan 17 – 18Operation Pioneer I[1]2nd Battalion, 16th Infantry Regiment search and destroy operationBiên Hòa Province
Jan 18 – 20Operation Retriever I[1]173rd Airborne Brigade search and destroy operationBinh Hoa and Bình Dương Provinces
Jan 19 – Feb 21Operation Van Buren[2][6]101st Airborne Division, ROK 2nd Marine Brigade and ARVN 47th Regiment rice security operationPhú Yên Province67954 US, 45 ROK
Jan 20 – 24Operation Kamehameha I[1]3rd Brigade, 25th Infantry Division security operation along Route 19Pleiku Province
Jan 24 – 26Operation Pioneer II[1]2nd Brigade, 1st Infantry Division search and destroy operationBiên Hòa Province
Jan 24 – 26Operation Quick Kick III[7]1st Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Jan 24 – 30Operation Retriever II[1]173rd Airborne Brigade search and destroy operationBinh Hoa and Bình Dương Provinces
Jan 24 – Mar 6Operation Masher/White Wing/Thang Phong II[5]:19-25[8]1st Cavalry Division, ARVN 22nd Division Airborne Brigade and 1st Regiment ROK Capital Division operation USMC Operation Double Eagle links in cross border segmentBình Định Province2389288 US, 10 ROK, 119 ARVN
Jan 28 – Feb 1Operation Red Ball V[1]1st Brigade, 1st Infantry Division resupply operationBình Dương Province
Jan 28 – Feb 15Operation Mallet[1]2nd Brigade, 1st Infantry Division search and destroy operation to open Route 15Long Khánh Province
Jan 28 – Feb 17Operation Double Eagle[1][5]:19-253rd Battalion, 1st Marines, 2nd Battalion, 3rd Marines, 2nd Battalion, 4th Marines, 2nd Battalion, 9th Marines operation linking in with Operation Masher/White Wing, Operation Lien Ket 22 and Operation Thang Phuong IIQuảng Ngãi and Quảng Trị Provinces31224
Jan 29 – 31Operation Kamehameha II[1]3rd Brigade, 25th Infantry Division security operation along Route 19Pleiku Province
Jan 30 – 31Operation Bobcat[1]US search and destroy operationIII Corps
Jan 30 – Feb 3Operation Bobcat Tracker[1]2nd Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province
FebOperation Reconstruction[1]1st Brigade, 101st Airborne Division, ROK 2nd Marine Brigade and ARVN 47th Regiment search and destroy operationsouth of Tuy Hòa Phú Yên Province
Feb 3 – 9Operation Quick Kick IV[1]1st Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Feb 3 – 15Operation Taro Leaf[1]2nd Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province
Feb 4- 9Operation Roundhouse[1][4]173rd Airborne Brigade and 1st Battalion, Royal Australian Regiment search and destroy operationBiên Hòa and Bình Dương Provinces
Feb 5 – 8Operation Taylor[1]3rd Brigade, 25th Infantry Division search and destroy and road clearing operationKon Tum and Pleiku Provinces
Feb 6 – Mar 6Operation Thừa Thiên 177[2]ARVN operationThừa Thiên Province18317
Feb 7 – 11Operation Road Runner VI[1]3rd Brigade, 1st Infantry Division road clearing and security operation along Route 13north of Bến Cát District, Bình Dương Province
Feb 7 – 16Operation Taut Bow[1]3rd Reconnaissance Battalion reconnaissance in force operation"Happy Valley", Quảng Nam Province
Feb 7 – May 1972Operation Shed Light[9]USAF programme to develop night and adverse weather interdiction capabilitiesSouth Vietnam & Laos
Feb 8 – 9Operation Bald Eagle[1]3rd Brigade, 1st Infantry Division search and destroy operationIII Corps
Feb 9 – 21Operation Kamehameha III[1]3rd Brigade, 25th Infantry Division security operation along Route 19Bình Định and Pleiku Provinces
Feb 11 – 28Operation Eagle's Claw[10]1st Cavalry Division operationBình Định Province340172
Feb 11 – Mar 2Operation Rolling Stone[4][3]:301st Infantry Brigade, 1st Battalion, Royal Australian Regiment and the New Zealand artillery combined search and destroy, road repair, and pacification operation30 km northwest of Bien Hoa Air Base, Bình Dương Province15411 US
Feb 12 – 16Operation Entree[1]173rd Airborne Brigade search and destroy operationBiên Hòa Province
Feb 12 – 16Operation Evansville[1]1st Infantry Division search and destroy operationBình Dương Province
Feb 13Operation An Dan 14/66[2]ARVN operationLong An Province15021
Feb 14 – 16Operation Breezeway[1]1st Battalion, 16th Infantry Regiment road clearing and security operation along Route 13Bình Dương Province
Feb 14 – 16Operation Paddy Bridge[1]2nd Battalion, 27th Infantry Regiment search and destroy operationHậu Nghĩa Province
Feb 15 – 21Operation Thang Long 234[2]ARVN operationDarlac Province27062
Feb 17 – 28Operation Double Eagle II[5]:34BLT 3rd Battalion, 1st Marines and 3rd Battalion, 12th Marines search and destroy operation to engage the 1st VC RegimentQue Son Valley125
Feb 18 – 19Operation Belt Line[1]3rd Brigade, 1st Infantry Division road clearing and security operation along Route 13Bình Dương Province
Feb 21 – 27Operation Mastiff[1]2nd and 3rd Brigades, 1st Infantry Division search and destroy operationMichelin Rubber Plantation and the Boi Loi woods, Bình Dương, Binh Long and Tây Ninh Provinces
Feb 22 – 24Operation Clean Sweep I[11]2nd Brigade, 25th Infantry Division and ARVN 49th Regiment search and destroy operationCu Chi area115 US
Feb 22 – Mar 2Operation Lam Son 235[12]:2482 Regiments of the ARVN 1st Division search and destroy operationQuảng Trị Province44435
Feb 25 – Mar 24Operation Garfield[2]3rd Brigade, 25th Infantry Division operationDarlac Province12417
Feb 26 – 28Operation Kolchak I[1][13]2nd Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province5
Feb 26 – Mar 1Operation Phoenix[1]173rd Airborne Brigade search and destroy operationBiên Hòa Province15
Feb 26 – Mar 24Operation Harrison[2][14]1st Brigade, 101st Airborne Division search and clear operationTuy Hòa area, Phú Yên Province28542
Feb 27 – Mar 3Operation New York[2][5]:51-62nd Battalion, 1st Marines, and HMM-163 sweep operation joining with ARVN Operation Thừa Thiên 177east of Phu Bai, Thừa Thiên Province12215
Mar 1 – 2Operation Beer Barrel[1]3rd Brigade, 1st Infantry Division road security operationBình Dương Province
Mar 1 – 5Operation Black Horse[1]2/1 Cavalry search and destroy operationBình Định Province
Mar 1 – 5Operation Hattiesburg[1]2nd Brigade, 1st Infantry Division search and destroy operationTây Ninh Province
Mar 3 – 6Operation Red Ball VI[1]1st Brigade, 1st Infantry Division route security for resupply convoysBiên Hòa and Bình Dương Provinces
Mar 3 – 7Operation Cocoa Beach[2]3rd Brigade, 1st Infantry Division search and destroy operationBình Dương Province19915
Mar 4Operation Waikiki[1]2nd Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province
Mar 4 – 7Operation Utah/Operation Lien Ket 26[2][5]:109-193rd Battalion, 1st Marines, 2nd Battalion, 4th Marines, 1st Battalion, 7th Marines, 2nd Battalion, 7th Marines and ARVN 2nd Division search and destroy operation against the PAVN 36th Regiment and VC Main Force units operation. First USMC contact with the NVA11 km northwest of Quảng Ngãi City,63283 US, 32 ARVN
Mar 6 – 8Operation Boston[1]3rd Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Mar 7 – 24Operation Silver City[1][2][4]1st Brigade, 1st Infantry Division, 173rd Airborne Brigade, 1st Battalion, Royal Australian Regiment and ARVN 10th Division search and destroy operation. Major enemy unit encountered is the VC 271st Main Force Regimentalong the Song Be River, Bình Dương Province/Long Khánh Province border area336107
Mar 7 – 28Operation Jim Bowie[1]2/1 Cavalry and 3/1 Cavalry search and destroy operationBình Định Province
Mar 9 – 10Operation Los Angeles[1]3rd Brigade, 1st Infantry Division route and convoy security operation along Route 13Bình Dương Province
Mar 12Operation Toledo[1]3rd Brigade, 1st Infantry Division security operationIII Corps119
Mar 13 – 15Operation Tampa (1966)[1]3rd Brigade, 1st Infantry Division security operationIII Corps
Mar 13 – 17Operation Salem[1]1st Battalion, 18th Infantry Regiment search and destroy operationIII Corps
Mar 14 – 19Operation Honolulu[1]2nd Brigade, 25th Infantry Division search and destroy operationCu Chi, Hậu Nghĩa Province
Mar 14 – 21Operation Buchanan/Operation Wyatt Earp/Operation Kam IV[1]2/1 Cavalry 2nd Battalion, 35th Infantry Regiment reconnaissance in force and security operation along Route 19II Corps
Mar 14 – 21Operation Wyatt Earp[1]2/1 Cavalry and 2nd Battalion, 35th Infantry Regiment reconnaissance in force and security operation on Route 19II Corps
Mar 17 – 18Operation Wheaton[1]2nd Brigade, 1st Infantry Division operationIII Corps
Mar 17 - 18Operation Massachusetts2nd Battalion, 4th Marines
Mar 18 – 19Operation Palestine[1]3rd Brigade, 1st Infantry Division security operationIII Corps
Mar 20 – 23Operation Oregon[1][5]:65-92nd Battalion, 1st Marines and 1st Battalion, 4th Marines search and destroy operationQuảng Trị Province
Mar 20 – 24Operation Cuu Long 15[2]ARVN operationKien Tuong Province2193
Mar 20 – 25Operation Texas/Operation Lien Ket 28[1][5]:120-73rd Battalion, 1st Marines, 3rd Battalion, 7th Marines, 2nd Battalion, 4th Marines, ARVN 5th Airborne Battalion and Republic of Vietnam Marine Corps combined reaction force operation landing near An Hoa to encounter the 60th and 90th battalions of the 1st VC Regiment and the 11th Battalion, 21st NVA RegimentAn Hoa62399
Mar 20 – 28Operation Kings[1][5]:78-973rd Battalion, 3rd Marines, 2nd Battalion, 9th Marines and 3rd Tank Battalion search and destroy operation25 km southwest of Da Nang, Quảng Nam Province
Mar 21Operation Lê Lợi 15[2]ARVN Special Forces operationDarlac Province13410
Mar 21 – May 5Operation Benning[1]US security operationII Corps
Mar 23 – 25Operation Brownsville[1]3rd Brigade, 1st Infantry Division search and destroy operationIII Corps
Mar 23 – 26Operation Brunswick[1]US security and road clearing operation along Route 13III Corps
Mar 23 – 27Operation Mang Ho V[2]ROKA Capital Division search and destroy operationBình Định Province34917
Mar 23 – 27Operation Monroe[1]2nd Brigade, 1st Infantry Division search and destroy operationIII Corps
Mar 24 – 25Operation Waycross[1]1st Brigade, 1st Infantry Division and ARVN 5th Division search and destroy operationnorthwest of Phu Loi, Bình Dương Province
Mar 24 – 26Operation Dan Chi 211/B[2]ARVN operationBa Xuyen Province24517
Mar 24 – 29Operation Olympa[1]3rd Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Mar 25 – Apr 8Operation Lincoln[15]1st and 3d Brigades, 1st Cavalry Division and 3rd Brigade, 25th Infantry Division search and destroy/reconnaissance in force operation against the same PAVN units that had participated in the battle of the Ia Drang Valleyvicinity of Plei Me and the Chu Pong Massif, Pleiku and Darlac Provinces52251
Mar 26 – Jul 21Operation Fillmore[2][16]1st Brigade, 101st Airborne Division, ROK 2nd Marine Brigade and ARVN 47th Regiment operationvicinity of Tuy Hòa, Phú Yên Province134[17]8 US
Mar 26 – Apr 6Operation Jackstay[1][5]:300SLF 1st Battalion, 5th Marines and 2 Battalions of Vietnamese Marines search and clear operation along the Long Tau shipping channelRung Sat Special Zone636
Mar 26 – Sep 23Operation Su Bok[2]ROK Capital Division operationBình Định Province29923
Mar 27 – Apr 1Operation Red Ball VII[1]1st Battalion, 28th Infantry Regiment search and destroy operationIII Corps
Mar 27 – May 5Operation Buchanan II[1]2/1 Cavalry 2nd Battalion, 35th Infantry Regiment road clearing operation along Route 19 from Qui Nhơn to PleikuPleiku Province
Mar 28 – 30Operation Indiana/Operation Lien Ket 30[1][5]:127-311st Battalion, 7th Marines and ARVN 5th Regiment, 2nd Division operation to reinforce ARVN Operation Quyet Tang 72Quảng Ngãi Province16911
Mar 29 – 30Operation Alabama[1]USMC search and destroy operationIII Corps
Mar 29 – Apr 5Operation Circle Pines[2][18]1st Battalion, 5th Infantry Regiment and ARVN 7th Regiment operationHo Bo Woods, Hậu Nghĩa Province17032
Mar 30 – Apr 15Operation Abilene[19]1st Infantry Division and 1st Battalion, Royal Australian Regiment operationPhước Tuy Province9248
AprOperation Cuu Long 7[19]ARVN 7th Division search and destroy operationKien Tuong Province14011
AprOperation Lam Son 255 [19]ARVN 1st Division operationQuảng Tín Province33
AprOperation Nevada/Operation Lien Ket 34[1]1st Battalion, 2nd Marines, 2nd Battalion, 7th Marines, ARVN 2nd Division and VNMC search and destroy operationBatangan Peninsula, Quảng Ngãi Province683
Apr 1 – 7Operation York[1]1st Battalion, 28th Infantry Regiment search and destroy operationIII Corps
Apr 1 – 11Operation Orange[19]1st Battalion, 3rd Marines search and destroy operationnear Thường Ðức, 40 km southwest of Da Nang, Quảng Nam Province5718
Apr 2 – 13Operation Bun Kae 66-5[2]ROK Capital Division operationBình Định Province29223
Apr 6 – 8Operation Kahuku[1][20]1st Battalion, 5th Infantry Regiment and ARVN 49th Regiment search and destroy operationwest of Cu Chi26
Apr 8 – 10Operation Iowa[1]3rd Battalion, 1st Marines and 2nd Battalion, 4th Marines search and destroy operationQuảng Tín Province
Apr 9 – 25Operation Denver[1]173rd Airborne Brigade and 1st Battalion, Royal Australian Regiment search and destroy operationvicinity of Sông Bé, Phước Long Province
Apr 11 – 14Operation Makaha[1]2nd Brigade, 25th Infantry Division search and destroy operation northwest of Cu ChiHậu Nghĩa Province
Apr 11 – 17Operation Mosby I[1] (part of Operation Lincoln)1/1 Cavalry 3/1 Cavalry and 5th Battalion, 14th Cavalry Regiment reconnaissance in force along Cambodian borderwestern Kon Tum and Pleiku Provinces
Apr 12 – May 18Operation Austin[1]1st Brigade, 101st Airborne Division operationsBình Thuận, Bình Tuy, Lâm Đồng, Phước Long and Quang Doc Provinces
Apr 12 – 26Operation Austin I[1]1st Brigade, 101st Airborne Division search and destroy operationupper Dak Som River valley, III Corps
Apr 12 – 26Operation Austin II[1]1st Brigade, 101st Airborne Division search and destroy operationnorthwest of Phan Thiết
Apr 13 – 14Operation Kaena[1]2nd Brigade, 25th Infantry Division search and destroy operation in support of Operation MakahaHậu Nghĩa Province
Apr 13 – 14Operation Kalamazoo[1][21]1st Battalion, 5th Infantry Regiment operationHo Bo Woods northwest of Cu Chi267
Apr 13 – May 1Operation Longfellow[1]3rd Brigade, 25th Infantry Division and ARVN 42nd Regiment search and destroy operation to search the area west of Route 14 north from Dak To toward Dak Pek in support of Army Engineers repairing and improving Route 14Kon Tum Province
Apr 14 – 16Operation Quyet Thang 184[2][19]ARVN 2nd Division operationQuảng Ngãi Province20611
Apr 15 – 17Operation Bolivar[1]3rd Brigade, 1st Infantry Division road clearing operation from Lai Khe to Phu Cuong
Apr 15 – 20Operation Miami[1]1st Brigade, 1st Infantry Division search and destroy operationIII Corps
Apr 16 – 21Operation Kahala[22][23]2nd Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province553
Apr 17 – 20Operation Yell[1]1st Battalion, 1st Marines and 2nd Battalion, 1st Marines search and destroy operationQuảng Nam Province
Apr 17 – May 1Operation Virginia[1][5]:140-31st Battalion, 1st Marines search and destroy and reconnaissance in force operationvicinity of Khe Sanh Special Forces camp, Quảng Trị Province
Apr 17 – May 4Operation Lexington[1]2nd Brigade, 1st Infantry Division saturation patrolling as a follow-up to Operation Jackstaynorth of the Rung Sat Special Zone
Apr 17 – Jun 9Operation Lexington III[1]1st Battalion, 18th Infantry Regiment search and destroy operationRung Sat Special Zone, Biên Hòa Province
Apr 18 – 20Operation Otsego[1]1st Infantry Division search and destroy operationBình Dương Province
Apr 20 – 21Operation Bristol[1]US operationIII Corps
Apr 20 – 22Operation Omaha[1]2nd Brigade, 1st Infantry Division search and destroy and road clearing operation on Route 13between Chơn Thành District and Lai Khe
Apr 20 – May 10Operation Georgia[1][2]1st Battalion, 4th Marines, 2nd Battalion, 4th Marines, 3rd Battalion, 4th Marines and 3rd Battalion, 9th Marines search and destroy operation around the An Hoa industrial complex and Nhong SonQuảng Nam Province1038
Apr 21 – 25Operation Dan Chi 219C[2][22]ARVN 21st Division operationChuong Thien Province24720
Apr 21 – May 3Operation Mosby II[1]2/1 Cavalry reconnaissance in force and interdiction of VC movement west of Route 14Kon Tum and Pleiku Provinces
Apr 22 – 23Operation Bowie[1]3rd Brigade, 1st Infantry Division and ARVN 5th Division search and destroy operation and saturation patrolling along Route 13vicinity of Lai Khe
Apr 22 – 23Operation Chattanooga[1]1st Battalion, 26th Infantry Regiment search and destroy operationIII Corps
Apr 22 – 24Operation Hot Springs/Operation Lien Ket 36[2]3rd Battalion, 1st Marines, 2nd Battalion, 7th Marines, 3rd Battalion, 7th Marines and ARVN 5th Regiment, VNMC 1st Battalion and 5th Airborne Battalion operationQuảng Ngãi Province1038
Apr 24 – May 17Operation Birmingham[3]:301st Infantry Division and ARVN 5th Division multi-brigade search and destroy operations on the eastern flank of War Zone C to open Route 13 from Saigon to the north and engage the Viet Cong 9th DivisionTây Ninh Province11956 US
Apr 26 – 28Operation Bee Bee[1]3/1 Cavalry show of force operationnear Bong Son, Bình Định Province
Apr 26 – 30Operation Wyoming[1]3rd Battalion, 1st Marines and 2nd Battalion, 5th Marines search and destroy operation15 km northwest of Chu Lai, Quảng Tín Province
Apr 27 – May 2Operation Osage[1][5]:143SLF 1st Battalion, 5th Marines rice harvest security operationThừa Thiên Province
Apr 27 – May 12Operation Maili[1]2nd Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province
Apr 27 – May 12Operation Maimi[1]1st Brigade, 1st Infantry Division road clearing operationTân Uyên District
MayOperation Khung Long[24]ARVN operationBình Định Province3019
MayOperation Xay Dung 31[24]ARVN operationBình Long Province3329
May 1–18Operation Austin IV[2]1st Brigade, 101st Airborne Division, 173rd Airborne Brigade and ARVN 45th Regiment operationQuang Duc Province and Phước Long Province1019
May 2 – 12Operation Lihue[1]2nd Brigade, 25th Infantry Division security operation on Route 22between Cu Chi and Tây Ninh
May 3 – 15Operation Lewis and Clark[1]2/1 Cavalry reconnaissance in force operationfrom Pleiku to An Khê
May 4–6Operation Dexter[1]173rd Airborne Brigade search and destroy operationPhước Thành Province
May 4–7Operation Cherokee[1]1st Battalion, 1st Marines, 2nd Battalion, 4th Marines and 3rd Battalion, 4th Marines search and destroy operationThừa Thiên Province
May 4–16Operation Davy Crockett[25]3/1 Cavalry and ARVN 22nd Division search and destroy operation revisited the Operation Masher/White Wing area; the PAVN and VC offered resolute resistance, often entrenched or firing out of large, hardened clay anthillsnear Bong Son in Bình Định Province345156
May 7–9Operation Hollingsworth[1]1st Infantry Division four Battalion air assault on suspected VC headquartersTây Ninh Province
May 9 – 14Operation Montgomery/Operation Lien Ket 40[1]1st Battalion, 5th Marines, 1st Battalion, 7th Marines, 2nd Battalion, 7th Marines and VNMC 2nd & 5th Battalions security operationQuảng Ngãi Province
May 10 – 12Operation Wayne[1][5]:1434th Marines search and destroy operation 10 km southwest of Phu BaiThừa Thiên Province
May 10 – Jul 31Operation Paul Revere/Operation Than Phong 14[1][2]3rd Brigade 25th Infantry Division, 1 Battalion from the 2/1 Cavalry, Troop B, 1st Squadron, 9th Cavalry Regiment, 2 ROKA Battalions and 2 ARVN Battalions border screening, area-control operation which thwarts a VC monsoon season offensiveDarlac and Pleiku Provinces54663 US, 16 ARVN
Aug 25 – Oct 18Operation Paul Revere III[1]2nd Brigade, 4th Infantry Division, 2nd and 3rd Brigades 25th Infantry Division and 3/1 Cavalry operation26 km west of Pleiku463
May 12–13Operation Asheville[1]4th Battalion, 9th Infantry Division search and destroy operationIII Corps
May 14–16Operation Dan Chi 227[2][24]ARVN operationAn Xuyen Province2471
May 15 – 17Operation Yuma[1]3rd Battalion, 7th Marines search and destroy operationQuảng Ngãi Province
May 16Operation Wahiawa[24]1st and 2nd Brigades, 25th Infantry Division search and destroy operation in the Bo Loi Woods, Ho Bo Woods and Filhol PlantationHậu Nghĩa Province10325
May 16 – Jun 5Operation Crazy Horse/Operation Bun Kae 66-7 [2][12]:1071st Cavalry Division, ROK Capital Division and ARVN operationbetween Vĩnh Thạnh and Soui Ca Valleys of Bình Định Province50129
May 17Operation Dan Chi 228B[2][24]ARVN operationBạc Liêu Province2676
May 17 – 21Operation Providence[1]1st Brigade, 1st Infantry Division search and destroy and route security operation from Tân Uyên District to Phuoc Vinh
May 19–26Operation El Paso I[1]3rd Brigade, 1st Infantry Division search and destroy operation and reinforcement of Lộc Ninh Special Forces campBình Long Province
May 20 – 22Operation Morgan[1]3rd Battalion, 7th Marines and 2nd Battalion, ARVN 4th Regiment search and destroy operationQuảng Ngãi Province
May 21 – 23Operation Long Phi 971[24]ARVN operationKiên Giang Province2246
May 23 – Jun 25Operation Athens[1]3rd Battalion 4th Marines search and operation25 km south of Huế in Thừa Thiên Province
May 24Operation Cheyenne I[1]1st Battalion, 5th Marines search and destroy operation along the coast20 km north of Chu Lai
May 24 – Jun 4Operation Hardihood[4]173rd Airborne Brigade and 1st Battalion, Royal Australian Regiment multi-battalion reconnaissance operation and the clearance of Nui Dat and the establishment of the 1st Australian Task Force base areaVũng Tàu area, Phước Tuy Province48
May 25 – 28Operation Mobile[1]17th Marines, ARVN 5th Regiment and VNMC 5th Battalion search and destroy operationQuảng Ngãi Province
May 27–28Operation Chicago[1]US security operationIII Corps
May 30Operation Quyet Thang 296[2]ARVN operationQuảng Tín Province1002
May 30 – Jun 6Operation Reno I[1]2nd Brigade, 1st Infantry Division search and destroy operationIII Corps
May 30 – Jun 8Operation Reno[1][5]:146-72nd Battalion, 4th Marines reconnaissance in forcevicinity of Dong Ha, Quảng Trị Province
May 30 – Jun 9Operation Adelaide I[1]1st Brigade, 1st Infantry Division search and destroy operation and security for repair of Route 16III Corps
May 31Operation Cheyenne II[1]1st Battalion, 5th Marines search and destroy operationI Corps
May 31 – Jun 8Operation Adelaide II[1]Search and destroy operation and cordon and search operationBình Dương Province
Jun – AugOperation Enogerra[4]6th Battalion, Royal Australian Regiment search and clearance of Long Phouc villagePhước Tuy Province
Jun 1 – 6Operation Muskegon[1]3rd Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Jun 1 – 9Operation Beaver II[1]USMC search and destroy operationI Corps
Jun 2 – 5Operation Lam Son 11[26]1st Squadron, 4th Cavalry and 7th Company, 7th ARVN Regiment operationBình Dương Province
Jun 2 – 21Operation Hawthorne/Operation Dan Tang 61[27]1st and 2nd Battalions, 327th Airborne Infantry Regiment, 2nd Battalion 502nd Airborne Infantry Regiment, 1st Battalion, 5th Cavalry Regiment and ARVN 42nd Regiment and 21st Ranger Battalion operationKon Tum Province688 plus further 506 estimated48 US, 10 ARVN
Jun 2 – Jul 13Operation El Paso II[1][2][12]:952nd Battalion, 18th Infantry Regiment, 2nd Battalion, 28th Infantry Regiment, 1st Squadron, 4th Cavalry Regiment and ARVN 5th Division operation against Vietcong 9th Division on Route 13near Minh Thanh in Bình Long Province85547
Jun 3 – Jul 3Operation Fort Smith[1]1st Brigade, 25th Infantry Division search and destroy and pacification operations along Route 1Hậu Nghĩa Province
Jun 3 – 9Operation Makiki[1]2nd Brigade, 25th Infantry Division and ARVN 49th Regiment search and destroy operationHậu Nghĩa Province
Jun 6Operation Muskegon (USMC)[1]2nd Battalion, 2nd Marines search and destroy operationI Corps
Jun 6 – 9Operation Joliet[1]4th Battalion, 9th Infantry Regiment search and destroy operation6 km east of Cu Chi, III Corps
Jun 6 – 12Operation Apache[1]2nd Battalion, 5th Marines search and destroy operationQuảng Trị Province
Jun 6 – 20Operation Benning II[1]US security operationII Corps
Jun 7 – 9Operation Adelaide III[1]Search and destroy operation and road clearing operation from Di An to Phước VĩnhBình Dương Province
Jun 7 – 12Operation Thang Phong III[2]ARVN and CIDG operationPleiku Province13520
Jun 8 – 18Operation Hollandia[1]173rd Airborne Brigade search and destroy operationLong Hải peninsula, Phước Tuy Province
Jun 9 – 12Operation Florida[1]USMC search and destroy and operationThừa Thiên Province
Jun 9 – 21Operation Hooker I[1]2/1 Cavalry reconnaissance and security operation along the Cambodian borderwestern Kon Tum and Pleiku Provinces
Jun 12 – 14Operation Fargo I[1]1st Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province
Jun 13Operation Mexicali[1]1st Battalion, 5th Infantry Regiment search and destroy operationHậu Nghĩa Province
Jun 13 – Jul 4Operation Santa Fe (1966)[1]1st Battalion, 27th Infantry Regiment search and destroy operationHậu Nghĩa Province
Jun 16Operation Longstreet[1]ROK 2nd Marine Brigade engineering security operationBình Định and Phú Yên Provinces
Jun 17 – 21Operation Helemano[1]4th Battalion, 9th Infantry Regiment search and destroy operationHậu Nghĩa Province
Jun 17 – 23Operation Dodge[5]:1492nd Battalion, 4th Marines search and destroy operationQuảng Trị Province
Jun 18 – 30Operation Deckhouse I[1][5]:304BLT 3rd Battalion, 5th Marines operation in support of the 1st Cavalry Division's Operation Nathan HalePhú Yên Province400
Jun 19 – Jul 1Operation Nathan Hale[2]1st Cavalry Division and 1st Brigade, 101st Airborne Division operationvicinity of Dong Tre and Tuy Hòa, Phú Yên Province45962
Jun 21 – 24Operation Lam Son 283 [2]ARVN operationQuảng Trị Province33137
Jun 23 – Jul 9Operation Yorktown[1]173rd Airborne Brigade search and destroy operationXuân Lộc Province
Jun 24 – Jul 15Operation Beauregard[1]1st Brigade, 101st Airborne Division security operation of the Cambodian and Laotian bordersKon Tum and Pleiku Provinces
Jun 25 – Jul 1Operation Coco Palms[1][28]1st Battalion, 5th Infantry Regiment search and destroy operationnorthwest of Cu Chi in Bình Dương Province25
Jun 25 – Jul 2Operation Jay/Operation Lam Son 284[2][5]:1502nd Battalion, 1st Marines, 2nd Battalion, 4th Marines and ARVN operation to engage the PAVN 806th and 812th Battalions, 6th Regiment that had recently moved into the Quảng Điền District between Route 1 and the South China Sea about 20 km north of HuếThừa Thiên Province546
Jun 27 – Dec 1 68Operation Boone[29]MACV operation to develop a cross-border reconnaissance capability for Cambodia using Special Forces troopsCambodia
Jun 29 – Jul 1Operation Oakland/Operation Lien Ket 46[1]2nd Battalion, 7th Marines, 3rd Battalion, 11th Marines, 2nd Battalion, ARVN 5th Regiment ARVN 37th Ranger Battalion search and destroy operationQuảng Ngãi Province
Jun 30 – Jul 31Operation Benning III[1]2/1 Cavalry security operationBình Định Province
Jul 1 – 6Operation Holt/Operation Lam Son 286[1]3rd Battalion, 4th Marines and ARVN search and destroy operationThừa Thiên Province
Jul 2 – 30Operation Henry Clay[1]1st Cavalry Division and 2nd Battalion, 327th Airborne Infantry Regiment search and destroy operation in the Cambodian border area as a follow-up to Operation Nathan HaleBình Định, Phu Bon, Phú Yên, Pleiku and Darlac Provinces
Jul 2 – 31Operation Kahana[1]25th Infantry Division search and destroy operationBình Tuy and Long Khánh Provinces
Jul 4Operation James Bond[1]2/1 Cavalry counterintelligence operationBình Định Province
Jul 4 – 14Operation Sydney I[1][4]5th Battalion, Royal Australian Regiment search and destroy operationPhước Tuy Province
Jul 4 – Oct 27Operation Macon[1][5]:201-101st Battalion, 3rd Marines, 2nd Battalion, 3rd Marines, 3rd Battalion, 3rd Marines, 1st Battalion, 9th Marines, 2nd Battalion, 9th Marines and 3rd Battalion, 9th Marines search and destroy and security operation for the An Hoa industrial complexQuảng Nam Province50724
Jul 5Operation Cuu Long 32/66[2]ARVN operationKien Hoa Province1554
Jul 5 – 11Operation Binh Phu[2]ARVN operationBình Định Province13715
Jul 6 – 14Operation Washington[1][5]:211-31st Reconnaissance Battalion reconnaissance operation in the Do Xa regionQuảng Ngãi Province13
Jul 6 – 26Operation Springfield[1]1st Battalion, 2nd Infantry Regiment search and destroy operationIII Corps
Jul 7 – Aug 3Operation Hastings/Operation Deckhouse II[5]:160-751st Battalion, 3rd Marines, 2nd Battalion, 4th Marines, 3rd Battalion 4th Marines, 3rd Battalion, 5th Marines, 3rd Battalion, 9th Marines, 3rd Battalion, 12th Marines, 1st Battalion, 1st Marines and 2nd Battalion, 1st Marines and ARVN operation against the PAVN 324B DivisionCam Lo area near the DMZ882183
Jul 8 – 12Operation Thăng Long 243[2]ARVN operationDarlac Province10717
Jul 8 – 13Operation Ewa[1]1st Battalion, 27th Infantry Regiment search and destroy operationHậu Nghĩa Province
Jul 9 – 17Operation Aurora I[1]173rd Airborne Brigade search and destroy operationLong Khánh Province
Jul 9 – AugOperation Bun Kae 66-9[2]ROK Capital Division operationPleiku Province1067
Jul 12 – Sep 3Operation El Paso III[1]1st Brigade, 1st Infantry Division search and destroy operationBinh Long and Phước Long Provinces
Jul 13 – 15Operation Fresno (Hậu Nghĩa)[1]2nd Battalion, 27th Infantry Regiment search and destroy operationHậu Nghĩa Province
Jul 13 – 22Operation Kansas[5]:132III MAF operation which involved inserting a series of 13-man reconnaissance teams to observe and bring fire on the NVA and VCQue Son Valley, Quang Tin and Quảng Nam Provinces859
Jul 14 – 22Operation Mokuliea[1]2nd Brigade, 25th Infantry Division search and destroy operationBình Dương and Hậu Nghĩa Provinces
Jul 15 – 23Operation Sydney II[1][4]5th Battalion, Royal Australian Regiment search and destroy operationPhước Tuy Province
Jul 16Operation Deckhouse II[1][5]:1633rd Battalion, 5th Marines and HMM-363 operation in support of Operation Hastingsnortheast of Dong Ha in Quảng Trị Province
Jul 16 – 18Operation Brisbane[1]6th Battalion, Royal Australian Regiment operationPhước Tuy Province
Jul 17Operation Lam Son 290 [2]ARVN operationQuảng Trị Province135
Jul 17 – 22Operation Cedar Rapids I[1]1st Battalion, 2nd Infantry Regiment and 1st Battalion, 26th Infantry Regiment search and destroy operationBình Dương Province
Jul 17 – Aug 1Operation Hayes[1]3/1 Cavalry reconnaissance and screening mission along the Cambodian border west of Dak To and Dak Pek including surveillance of known and suspected infiltration routesKon Tum Province
Jul 17 – Aug 3Operation Aurora II[1]173rd Airborne Brigade search and destroy operationPhuong Lam Province
Jul 21 – Sep 4Operation John Paul Jones[1][2]2nd Brigade, 4th Infantry Division, 1st Brigade, 101st Airborne Division and ROK 2nd Marine Brigade operation40 km west of Tuy Hòa, Phú Yên Province15812
Jul 20Operation Tally Ho[1]Air and naval gunfire interdiction of lines of communicationsouthern panhandle of North Vietnam
Jul 22 – 24Operation Cedar Rapids II[1]1st and 2nd Battalions, 2nd Infantry Regiment search and destroy operationBình Dương Province
Jul 23 – Aug 6Operation Koko Head[1][30]2nd Brigade, 25th Infantry Division search and destroy operationBình Dương and Hậu Nghĩa Provinces6
Jul 24 – 29Operation Hobart[4]6th Battalion, Royal Australian Regiment search and destroy operation
Jul 25Operation Steel Horse VII[1]6th Battalion, 16th Field Artillery harassment and interdiction operationBình Định Province
Jul 26 – 29Operation Franklin/Operation Lien Ket 50[1]1st Battalion, 7th Marines, 2nd Battalion, 7th Marines and ARVN 2nd Division search and destroy operationQuảng Ngãi Province
Jul 26 – Aug 1Operation Springfield II[1]1st Battalion, 2nd Infantry Regiment search and destroy operationIII Corps
Jul 31 – Sep 2Operation Benning IV[1]1/1 Cavalry security operationBình Định Province
Aug – SepOperation Blue Jay[31]II Field Force operation to support the deployment of the 196th Infantry Brigade to its base in Tây Ninh; the 25th Infantry Division was the sponsor, along with direct air force airlift from the port of Vũng Tàu to Tây Ninh, along with road convoys
Jul 31 – Aug 25Operation Paul Revere II[1]3rd Brigade 25th Infantry Division, 2/1 Cavalry, 3/1 Cavalry, ROKA, ARVN 23rd Division and ARVN 3rd Airborne Brigade search and clear operationPleiku Province62068
Aug 1 – 31Operation Oahu[1]1st Brigade, 25th Infantry Division search and destroy operationTây Ninh Province
Aug 2 – 8Operation Bucks[1]3rd Battalion, 1st Marines search and destroy operation 15 km south of Da NangQuảng Nam Province
Aug 2 – 14Operation Cheyenne (III Corps)[1]2nd and 3rd Brigades, 1st Infantry Division road clearing and security operation along Route 13between Lai Khe and An Loc
Aug 3 – Jan 31 1967Operation Prairie[1][5]:177-981st Battalion, 3rd Marines, 2nd Battalion, 3rd Marines, 3rd Battalion, 3rd Marines, 1st Battalion, 4th Marines, 2nd Battalion, 4th Marines, 3rd Battalion, 4th Marines, 2nd Battalion, 5th Marines, 2nd Battalion, 7th Marines, 3rd Battalion, 7th Marines, 2nd Battalion, 9th Marines and 1st and 3rd Battalions, 26th Marines search and destroy operation against the PAVN 324B Division in the hills at Con Thien/Gio Linh areas south of the DMZ at Mutter's Ridge, the Razorback, Hill 400, Hill 484 and The RockpileDMZ1397200
Aug 4 – 30Operation Seamont[1]26th Marines search and destroy operationPhú Quốc Island
Aug 6 – 21Operation Colorado/Operation Lien Ket 52[1][5]:214-201st Battalion, 5th Marines, 2nd Battalion, 5th Marines and 3rd Battalion, 5th Marines, 1st, 3rd and 4th Battalions Republic of Vietnam Marine Corps and ARVN 35th and 39th Ranger Battalions search and destroy operation to locate and destroy the PAVN 2nd Division (AKA 620th Division)Que Son Valley, Quảng Nam and Quảng Tín Provinces67422
Aug 7 – 18Operation Holsworthy[4][32]5th Battalion, Royal Australian Regiment operation to reclaim the village of Binh BaPhước Tuy Province
Aug 7 – Sep 1Operation Lahaina[1]2nd Battalion, 27th Infantry Regiment pacification operationHậu Nghĩa Province
Aug 8 – Sep 1Operation Aiea[1]2nd Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province
Aug 10 – 12Operation Wilcox[1]1st Battalion, 9th Marines search and destroy operationQuảng Nam Province
Aug 9 – Sep 7Operation Toledo[4]173rd Airborne Brigade, 2nd Battalion, 18th Infantry Regiment, BLT 1st Battalion, 26th Marines, 1st Australian Task Force and ARVN 33rd and 35th Ranger Battalions multi-battalion search and destroy operation in the May Tao Secret Zone. The deserted headquarters area for the VC 5th Division was located and destroyed along with vast amounts of suppliesLong Khánh, Bình Tuy and Phước Tuy Provinces11
Aug 10 – Oct 10Operation Stable[1]1st Logistical Command movement of the ROK 9th Division from Nha Trang to Tuy Hòa
Aug 11 – Apr 1967Operation Pink Rose[33]ARPA, US Forest Service and USAF operational testing of techniques to dry out and start forest firesTây Ninh and Phước Long Provinces
Aug 12 – 14Operation El Dorado[1]1st Brigade, 1st Infantry Division search and destroy operationBình Định Province
Aug 13 – 21Operation Suwannee[1]1st Battalion, 9th Marines and 3rd Battalion, 9th Marines search and destroy operationQuảng Nam Province
Aug 15 – 17Operation Belfast[1]1st Infantry Division search and destroy operationBình Dương Province
Aug 15 – 19Operation Gallup[1]US search and destroy operationIII Corps
Aug 16 – 18Operation Smithfield[4]6th Battalion, Royal Australian Regiment operation in response to VC mortar fire developed into a battle against the VC 275th RegimentLong Tan24518
Aug 16 – 29Operation Deckhouse III[1][5]:305SLF 1st Battalion, 26th Marines and the 173rd Airborne Brigade joint operationVũng Tàu peninsula, Bình Tuy Province24
Aug 18 – 20Operation Broome[1]US search and destroy operationIII Corps
Aug 18 – 20Operation Brown[1]1st Battalion, 1st Marines, 2nd Battalion, 1st Marines and ARVN 51st Regiment search and destroy operationQuảng Nam Province
Aug 18 – 20Operation Quang Dien[2]ARVN search and clear operationThừa Thiên Province10021
Aug 19 – 22Operation Castine[1]2nd Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Aug 20 – 22Operation Ottawa[1]3rd Battalion, 4th Marines search and destroy operationThừa Thiên Province
Aug 20 – 29Operation Allegheny[2]3rd Marines search and destroy operation22 km southwest of Da Nang in Quảng Nam Province1137
Aug 23 – Sep 2Operation Amarillo[2]1st Brigade, 1st Infantry Division mine-clearing operationPhu Loi area of Bình Dương Province
Aug 23 – Sep 23Operation Pole Star[1]ROK 2nd Marine Brigade clear and search operationBình Sơn District, Quảng Ngãi Province
Aug 23 – Sep 26Operation Mallard II[1]Deployment of 2nd Battalion, 34th Armored Regiment from Vũng Tàu to Long Binh
Aug 25 – 27Operation Long Phi 984[2]ARVN search and destroy operationKiên Giang Province13230
Aug 26 – 31Operation Darlinghurst[4]5th Battalion, Royal Australian Regiment clearing operation following 6 RAR's action at Long TanPhước Tuy Province
Aug 26 – Sep 6Operation Pawnee[1]3rd Battalion, 4th Marines search and destroy operationThừa Thiên Province
Aug 26 – Jan 20 68Operation Byrd1st Cavalry Division economy-of-force operationBình Thuận Province
Aug 27 – 29Operation Jackson/Operation Lien Ket 54[1]3rd Battalion, 5th Marines, 3rd Battalion, 7th Marines and ARVN 4th Regiment search and destroy operationQuảng Ngãi Province
Aug 31 – Sep 12Operation Kipapa[1][34]1st Brigade, 25th Infantry Division operationFilhol Plantation, Hậu Nghĩa Province86
Sep 1 – 4Operation Troy[1][5]:542nd Battalion, 1st Marines search and destroy operationQuảng Nam Province
Sep 1 – Oct 11Operation Sunset Beach[1]2nd Brigade, 25th Infantry Division search and destroy operationHậu Nghĩa Province
Sep 2 – 6Operation Dan Chi 261[2][35]ARVN operationAn Xuyen and Bạc Liêu Provinces21
Sep 2 – 29Operation Benning V[1]3/1 Cavalry security operationBình Định Province
Sep 3Operation Decatur[1]1st Battalion, 26th Infantry Regiment security operationQuon Loi – An Loc
Sep 4 – 6Operation Cranston[1]1st Battalion, 16th Infantry Regiment security and resupply operationbetween Lai Khe and Phu Loi522
Sep 4 – 15Operation El Paso[1]1st Battalion, 5th Marines, 2nd Battalion, 5th Marines and ARVN 2nd, 3rd and 4th Battalions, 6th Regiment search and destroy operationQuảng Tín Province
Sep 4 – 15Operation Napa/Operation Lien Ket 56[1]1st Battalion, 5th Marines, 3rd Battalion, 5th Marines and 2nd, 3rd, 4th Battalions, ARVN 6th Regiment search and destroy operationQuảng Tín Province
Sep 4 – Oct 8Operation Baton Rouge[1]1st Battalion 18th Infantry search and destroy operationRung Sat Special Zone
Sep 4 – Oct 25Operation Seward[2][36]1st Brigade, 101st Airborne Division and 1st Battalion, 22nd Infantry Regiment search and destroy and security operationPhú Yên Province34727
Sep 5 – 29Operation Meadowlark[1]Deployment of 11th Armored Cavalry Regiment from Vũng Tàu to Long Binh
Sep 6 – 9Operation Manh Ho[2]ARVN operationBình Định Province147
Sep 6 – 12Operation Bangor[1]2nd Battalion, 26th Infantry Regiment search and destroy operationBình Dương Province
Sep 7 – 12Operation Cannon[1]2nd Battalion, 1st Marines and 3rd Battalion, 9th Marines search and destroy operationQuảng Nam Province
Sep 8Operation Seaside[1]3rd Battalion, 1st Marines search and destroy operationQuảng Nam Province
Sep 8 – 9Operation Wilton[1]US search and destroy operationIII Corps
Sep 8 – 14Operation Pawnee II[1]3rd Battalion, 4th Marines search and destroy operationThừa Thiên Province
Sep 8 – 16Operation Fresno (Quảng Ngãi)[1]1st Battalion, 7th Marines search and destroy operationQuảng Ngãi Province
Sep 8 – 24Operation Vaucluse[1][4]5th Battalion, Royal Australian Regiment and 6th Battalion, Royal Australian Regiment search and destroy operationPhước Tuy Province
Sep 13 – 22Operation Atlantic City[1]3rd Brigade, 1st Infantry Division, 25th Infantry Division and 173rd Airborne Brigade search and destroy operationBình Dương Province
Sep 13 – Oct 2Operation Oliver Wendell Holmes[1]1/1/ Cavalry, 2/1 Cavalry and ARVN 3rd Airborne Brigade search and destroy operation
Sep 13 – Oct 30Operation Thayer I[2]1st Cavalry Division, ARVN 3rd Airborne Battalion and ARVN 41st Regiment operationBình Định Province23230
Sep 14 – Nov 25Operation Attleboro[3]:30196th Infantry Brigade, 1st Infantry Division and 4th Infantry Division and 173rd Airborne Brigade operationWar Zone "C" of Tây Ninh Province1,062115
Sep 14 – Feb 13 1967Operation Lanikai[1]1st Brigade, 25th Infantry Division pacification operationLong An Province
Sep 15 – 21Operation Danbury[1]1st Battalion, 16th Infantry Regiment and 2nd Battalion, 28th Infantry Regiment search and destroy operation10 km west of Lai Khe, III Corps
Sep 15 – 24Operation Deckhouse IV[1][5]:188SLF 1st Battalion, 26th Marines and 3rd Marine Reconnaissance Battalion operation as an adjunct to Operation Prairie12 km northeast of Dong Ha in I Corps20036
Sep 15 – Oct 9Operation Sioux City[37]173rd Airborne Brigade Combat Team search and destroy operationXom Cat, Biên Hòa Province
Sep 15 – Nov 14Operation Kalihi[1][38]1st Brigade, 25th Infantry Division operationFilhol Plantation in Hậu Nghĩa Province4
Sep 16 – 27Operation Golden Fleece 7-1/Operation Lien Ket 60[1][5]:2361st Battalion, 7th Marines and ARVN 4th Regiment operation to protect rice harvestMộ Đức District
Sep 16 – Oct 19Operation Wren[1]Deployment of the Philippine Civil Action Group from Cam Ranh Bay to Tây Ninh Province
Sep 19 – Oct 4Operation Kamuela[1][39]1st Brigade, 25th Infantry Division search and destroy operationBoi Loi Woods and Ben Cui Plantation, Bình Dương Province135
Sep 20 – 22Operation Huntsville[1]3rd Brigade, 1st Infantry Division and ARVN 48th Regiment search and destroy operationIII Corps
Sep 22 – 28Operation Binh Phu 27[2]ARVN operationBình Định Province
Sep 23 – Oct 1Operation Longview[1]1st Brigade, 1st Infantry Division route security and clearing operation on Route 16between Phuoc Vinh and Biên Hòa
Sep 23 – Oct 30Operation Mang Ho VI[2]ROKA Capital Division search and destroy operationBình Định Province116130
Sep 24Operation Coffee[1]2nd Battalion, 1st Marines search and destroy operationQuảng Nam Province
Sep 25Operation Boyd[1]2nd Battalion, 28th Infantry search and destroy operationBình Dương Province
Sep 28 – 29Operation Monterey[1]1st Battalion, 5th Marines and 2nd Battalion, 5th Marines search and destroy operationQuảng Tín Province
Sep 28 – 30Operation Kathy[1]ARVN 2nd and 8th Airborne Battalions search and destroy operationCapital Military District
Sep 29 – Oct 11Operation Benning VI[1]2/1 Cavalry security operationBình Định Province
Sep 30 – Oct 3Operation Crowsnest[4][40]:1675th Battalion, Royal Australian Regiment operation for the assistance for the village of Duc ThanhPhước Tuy Province
Sep 30 – Oct 2Operation Monterey II[1]1st Battalion, 5th Marines and 2nd Battalion, 5th Marines security operationQuảng Tín Province
OctOperation Traffic Cop[2]Initial phase of Operation Sea Dragon
Oct 1Operation Dazzlem (1966)[1]1st Cavalry Division and 173rd Airborne Brigade security operationBình Định Province
Oct 1 – 4Operation Little Rock[1]1st Brigade, 1st Infantry Division and ARVN 48th Regiment search and destroy operationPhước Long Province
Oct 1 – 25Operation Kern[1]2nd Battalion, 3rd Marines search and destroy operationQuảng Ngãi Province
Oct 2 – 24Operation Irving/Operation Dai Bang 800/Operation Mang Ho 6[26]:24-91st Cavalry Division, ROK Capital Division and ARVN 22nd Division operation against the PAVN 610th DivisionBình Định Province68129
Oct 2 – 27Operation Bathurst[1][4]5th Battalion, Royal Australian Regiment and 6th Battalion, Royal Australian Regiment search and destroy operationPhước Tuy Province
Oct 3 – 10Operation Decatur II[1]1st Infantry Division security operationIII Corps
Oct 3 – 10Operation Lee/Operation Lien Ket 64[1]ROK 2nd Marine Brigade and ARVN 4th Regiment operationQuảng Ngãi Province
Oct 3 – Nov 20Operation Lam Son 318 [2]ARVN operationQuảng Trị Province17938 ARVN, 1 US
Oct 6 – 10Operation Canberra [4]5th Battalion, Royal Australian Regiment search and destroy operation, reinforced with an APC squadron, to assist in securing Route 15 in the 1st Australian Task Force TAOR in support of the receipt and initial positioning of the 3rd Brigade, 4th Infantry Division at Bear Cat
Oct 6 – 15Operation Hickory (Biên Hòa)[1]3rd Squadron, 11th Armored Cavalry Regiment search and destroy operationsBiên Hòa Province
Oct 8 – 15Operation Kent[1]2nd Battalion, 7th Marines search and destroy operationQuảng Ngãi Province
Oct 8 – 16Operation Tulsa[1]1st Infantry Division and 5th Division road clearing operation along Route 13 between Phu Cuong and An LộcBình Dương and Bình Long Provinces
Oct 8 – Dec 4Operation Winchester[41]4th Battalion, 503rd Airborne Infantry Regiment search and destroy operation to relieve the 2nd Battalion, 26th Marines and to occupy and maintain control of an assigned sector of the Da Nang TAORDa Nang
Oct 11 – 16Operation Robin[1][4]5th Battalion, Royal Australian Regiment and 173rd Airborne Brigade operation to receive the 3d Brigade, 4th Infantry Division at the ports of Saigon and Vũng Tàu, and to safeguard the transport to, and initial occupation of, the designated brigade base camp at Ben Cat in Bình Dương Province. A full examination of the area was cut short as 5RAR was required for road security on Route 15 while the 196th Infantry Brigade moved from Vũng Tàu to Long Binh
Oct 11 – 20Operation Teton[1]3rd Battalion, 1st Marines search and destroy operationQuảng Nam Province
Oct 11 – Nov 14Operation Kailua[1][42]2nd Brigade, 25th Infantry Division operationHậu Nghĩa Province675
Oct 11 – Nov 17 1967Operation Uniontown (1966-67)[1]173d Airborne Brigade, 199th Light Infantry Brigade and 11th Armored Cavalry Regiment security and defence operationsaround Long Binh
Oct 16Operation Cuu Long 22/KT[2]ARVN operationDinh Tuong Province14
Oct 16 – 17Operation Craddock[1]US search and destroy operationIII Corps
Oct 16 – Dec 3Operation Leeds[1]3rd Brigade, 1st Infantry Division search and destroy operation
Oct 17 – 26Operation Queanbeyan[4]5th Battalion, Royal Australian Regiment search and destroy operation in AO Gold, a 14 square km area including Nui Thi Vai and the region north and west of itPhước Tuy Province
Oct 18 – 20Operation Dan Chi 263[2]ARVN operationChuong Tien Province13829 ARVN, 1 US
Oct 18 – 30Operation Dover[1]1st Battalion, 5th Marines search and destroy operationQuảng Tín Province
Oct 18 – Dec 31Operation Paul Revere IV[43]2nd Brigade, 4th Infantry Division, 2nd and 3rd Brigades, 25th Infantry Division and 2/1 Cavalry search and destroy operation along the Cambodian borderwestern II Corps962136
Oct 18 – Feb 1 1967Operation Duck[1]9th Infantry Division movement from Vũng Tàu to Bear Cat
Oct 19 – DecOperation Atlanta[2][40]:7411th Armored Cavalry Regiment mission to clear and secure lines of communication in three provinces near Saigon and to secure the new Blackhorse Base Camp13 km south of Xuan Loc1318
Oct 20 – 24Operation Bethlehem[1]2nd Brigade, 1st Infantry Division search and destroy operationBình Dương Province
Oct 21 – 23Operation Madison[1]3rd Battalion, 1st Marines search and destroy operationQuảng Nam Province
Oct 21 – Nov 5Operation Allentown/Lam Son II South[1]2nd Brigade, 1st Infantry Division search and destroy operationBiên Hòa, Bình Dương and Gia Định Provinces
Oct 25 – Nov 28Operation Bremerton[1]3rd Battalion, 22nd Infantry Regiment search and destroy operationRung Sat Special Zone
Oct 30 – Dec 4Operation Geronimo[2]Company C, 1st Battalion, 327th Infantry Regiment, 1st Brigade, 101st Airborne Division search operationPhú Hiệp11815
Oct 24 – Feb 11 1967Operation Thayer II[2][44]1st Cavalry Division, 25th Infantry Division and Republic of Vietnam Marine Corps operation in the coastal plains and the Kim Son and Soui Ca Valleyswestern Bình Định Province1,667193
Oct 25 – Apr 2 1967Operation Adams[1]1st Brigade, 4th Infantry Division, 1st Brigade, 101st Airborne Division and ARVN 47th Regiment operation to protect rice harvestPhú Yên Province49151
Oct 25 – Oct 31 1968Operation Sea Dragon[45]US Navy and Royal Australian Navy interdiction of sea lines of communication and supply from North Vietnam to South Vietnam5
Oct 29 – Dec 24Operation Pawnee III[1][5]:2242nd Battalion, 26th Marines search and destroy operationThừa Thiên Province
Oct 30 – 31Operation Bundaberg[1][4]5th Battalion, Royal Australian Regiment and 6th Battalion, Royal Australian Regiment cordon and search operationnear Hoa Long in Phước Tuy Province
Oct 31Operation Travis[1]2/1 Cavalry emergency deployment to support Operation Paul Revere IV
Nov – Jan 1970Operation Stable Door[46]US Navy defence of allied shipping against VC attacks
Nov 5 – 8Operation Lien Ket 68[2]ARVN search and destroy operationQuảng Tín Province10964
Nov 5 – 19Operation Shasta[1]2nd Battalion, 1st Marines, 2nd Battalion, 3rd Marines and 1st Battalion, 26th Marines search and destroy operationQuảng Nam Province
Nov 6 – 7Operation Yass[4]5th Battalion, Royal Australian Regiment cordon and search of Phuoc Hoa village and the clearance of Long Sơn IslandPhước Tuy Province
Nov 8 – 12Operation Hayman[4][47][48]3rd Squadron SAS and 5th Battalion, Royal Australian Regiment operation as a search and clear mission to round up VC who had infiltrated the fishing village on Long Sơn IslandLong Sơn Island
Nov 8 – 14Operation Arcadia[1]1st Battalion 1st Marines and 3rd Battalion 1st Marines search and destroy operationQuảng Nam Province
Nov 9 – 27Operation Dragon Eye[2]ROK 2nd Marine Brigade search and destroy operationQuảng Ngãi Province15438 ROK, 4 US
Nov 16 – Jan 12 67Operation Dan Tam 81[1]11th Armored Cavalry Regiment and ARVN 10th Division rice harvest security operationBình Tuy and Long Khánh Provinces
Nov 18 – Dec 3Operation Ingham[4][49]5th Battalion, Royal Australian Regiment and 6th Battalion, Royal Australian Regiment search and destroy operationXuyên Mộc District
Nov 19 – 27Operation Lien Ket 70[2]ARVN 2nd Division search and destroy operationQuảng Ngãi Province1233
Nov 18 – May 14 67Operation Fort Nisqually[1]3rd Brigade, 4th Infantry Division deployment from Bear Cat to Dầu Tiếng District and search and destroy operationsBình Dương Province
Nov 20 – 27Operation Rio Blanco/Operation Lien Ket 70[1]1st Battalion, 7th Marines and ARVN search and destroy operationQuảng Ngãi Province
Nov 20 – 27Operation Rio Grande/Operation Lien Ket 81[1]1st Battalion, 5th Marines, ROK 2nd Marine Brigade and ARVN 2nd Division search and destroy operationQuảng Ngãi Province
Nov 24 – Dec 2Operation Waco[1]1st Battalion, 503rd Airborne Infantry Regiment search and destroy operationBiên Hòa Province
Nov 25 – Dec 9Operation Bismark[1]1st Brigade, 1st Infantry Division search and destroy and road clearing operation along Route 16between Phuoc Vinh and Dĩ An District
Nov 27 – Dec 23Operation Charleston[1]2nd Battalion, 18th Infantry Regiment search and destroy operationRung Sat Special Zone
Nov 29 – Dec 5Operation Healdsburg[1]3rd Brigade, 1st Infantry Division search and destroy operationIII Corps113
Nov 29 – Dec 7Operation Mississippi[1]2nd Battalion, 5th Marines search and destroy operationQuảng Nam Province
Nov 30 – Dec 6Operation Sutter[1]1st Battalion, 5th Marines search and destroy operationQuảng Tín Province
Nov 30 – Dec 14 67Operation Fairfax/Operation Rang Dong[1][12]:1341 Battalion from each of the 1st Infantry Division, 4th Infantry Division, 25th Infantry Division, 196th Infantry Brigade, ARVN 5th Division and ARVN Rangers operationSaigon Capital Military District and Gia Định Province1,043179
DecOperation Boulder[1]1st Battalion, 26th Infantry Regiment search and destroy operation
Dec 4 – 5Operation Alexandria[1]11th Armored Cavalry Regiment operationDuc Thanh Province and Xuân Lộc District
Dec 4 – 14Operation Canary[4]1st Australian Task Force and 173rd Airborne Brigade two phase highway security operation along Route 15 from Phú Mỹ to Long Binh and from Phú Mỹ to Bear Cat for elements of the 199th Light Infantry Brigade and the 9th Infantry Division
Dec 6 – 7Operation Trinidad[1]1st Battalion, 1st Marines search and destroy operationQuảng Nam Province
Dec 8 – Jan 19 1967Operation Pickett[1]1st Brigade, 101st Airborne Division search and destroy operationKon Tum Province6220
Dec 7 – 11Operation Trinidad II[1]1st Battalion, 1st Marines search and destroy operationQuảng Nam Province
Dec 7 – 12Operation Cortez[1]3rd Battalion, 5th Marines search and destroy operationQuảng Tín Province
Dec 10 – Jan 12 67Operation Blackjack 22[1][50]Special Forces Detachment B-50 Project OMEGA and Mobile Guerilla Force 768 operationwestern Darlac Province
Dec 11 – 16Operation Sterling[1]3rd Battalion, 9th Marines search and destroy operationQuảng Nam Province
Dec 12 – Jan 21 1967Operation Sierra[1]2nd Battalion, 7th Marines search and destroy operationQuảng Ngãi Province
Dec 16 – 26Operation Initiator[1]199th Infantry Brigade search and destroy operationLong Binh Province
Dec 17 – 21Operation Glenn[1]3rd Battalion, 1st Marines search and destroy operationQuảng Nam Province
Dec 19 – 21Operation Shasta II[1]1st Battalion, 1st Marines search and destroy operationQuảng Nam Province
Dec 19 – 22Operation Santa Cruz[1]1st Infantry Division cordon and search operationBình Dương Province
Dec 20 – Feb 16 67Operation Chinook I[5]:224[51]4th Marines operationThừa Thiên Province218
Dec 24Operation Little Sheba[1]1st Brigade, 1st Infantry Division route and convoy security operationBiên Hòa Province
Dec 27 – 30Operation Dan Chi 270D[2]US and ARVN search and destroy operationChuong Tien Province1242 US
Dec 27 – 31Operation Wiggins[1]2nd Battalion, 3rd Infantry Regiment search and destroy operationBiên Hòa Province

See also

References
  1. "Vietnam Archive Operations Database". The Vietnam Center and Archive, Texas Tech University.
  2. "MACV Command History Chronology - 1966". Dcbsoftware.com. Archived from the original on 2012-03-05. Retrieved 2010-07-31.
  3. Turner Publishing (1997). The 1st Infantry Division in Vietnam: "The Big Red One", 1965-1970. ISBN 978-1-56311-100-6.
  4. "Vietnam War Timeline 1966". Veterans Support and Advocacy Service Australia. Archived from the original on 2010-07-02.
  5. Shulimson, Jack (1982). U.S. Marines in Vietnam: An Expanding War, 1966. History and Museums Division, Headquarters, U.S. Marine Corps.
  6. "Weekly report, The Situation in South Vietnam, 2 March 1966" (PDF). Central Intelligence Agency. Archived from the original (PDF) on 8 June 2011. Retrieved 9 August 2010.
  7. "Operation Quick Kick II Information for 1 Inf Div". Vietnam Helicopter Pilots Association.
  8. Mertel, Kenneth (1989). Year of the Horse – Vietnam. Bantam. p. 246. ISBN 978-0-553-28307-5.
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