7th Infantry Division (Vietnam)

In March 1970 the 209th Regiment engaged the U.S. 2nd Squadron, 11th Armored Cavalry Regiment near Lộc Ninh.

During the Battle of An Lộc, on 12 April 1972 a relief force of the Army of the Republic of Vietnam 32nd Regiment, 21st Division departed Lai Khê to reopen Route 13 to Chơn Thành Camp 30km south of An Lộc. After making slow progress, on 22 April the 32nd Regiment encountered a roadblock of the PAVN 101st Regiment 15km north of Lai Khê. From 24 April the 21st Division engaged the PAVN in a two-pronged attack to clear the road with the 32nd Regiment attacking from the north and the 33rd Regiment attacking from the south. These attacks eventually forced the 101st Regiment to withdraw west on 27 April leaving one battalion to cover the withdrawal for a further 2 days. The 31st Regiment was then lifted by helicopters 6km north of Chơn Thành where it fought the Division's 165th Regiment, later reinforced by the 209th Regiment, for the next 13 days. Eventually on 13 May with intensive air support the 31st Regiment overran the PAVN positions and extended ARVN control to 8km north of Chơn Thành. The 32nd Regiment then deployed into the Tau O area a further 5km north where they ran into the 209th Regiment's well-prepared blocking positions which stopped the 21st Division's advance for 38 days despite extensive artillery and air support including B-52 strikes. This stalemate would continue until the PAVN withdrew from An Lộc. On 15 May 1972 an ARVN task force of the 15th Regiment, 9th Division which was redeployed from the Mekong Delta and the 9th Armored Cavalry Squadron moved north east of Route 13 bypassing the 209th Regiment's roadblock at Tau O to establish a fire support base at Tan Khai 10km south of An Lộc. On 20 May the 141st Regiment attacked the base at Tan Khai and continued attacking unsuccessfully for 3 days against a determined defense before withdrawing.[1]^:131-3

On 20 July 1974, the High Command of the PAVN created the 4th Army Corps with Major General Hoang Cam appointed as its first commander. The 4th Army Corps comprised the 3rd and 7th Infantry Divisions, the 429th Special Forces Regiment, the 25th Engineers Regiment, the 210th and 235th Logistical Groups and the Viet Cong 9th Division.[2]

On 12 December 1974 the 4th Corps launched their assault on Phước Long. On 13 December the 7th and 3rd Divisions attacked Army of the Republic of Vietnam (ARVN) positions at Bố Đức and Duc Phong overrunning them the next day. On 26 December Regiment 141 attacked the ARVN base at Đôn Luân overrunning it within 5 hours. On 31 December the 4th Corps had surrounded Phước Long and began their assault on the city and by the evening of 5 January 1975 Phước Long had fallen. The battle was a turning point in the war because it showed that the United States was no longer prepared to intervene militarily to save South Vietnam and that the ARVN was overstretched with limited ability to respond forcefully to PAVN offensive action.[3]^:18–20

For the 1975 Spring Offensive, in March the 4th Corps attacked ARVN installations in Tây Ninh Province and Bình Dương Province. On 11 March the 4th Corps attacked Dầu Tiếng taking it within 2 days they then proceeded to attack other ARVN units and by 2 April controlled all of Bình Long Province. The 4th Corps then began to approach Xuân Lộc part of the last defensive line before Saigon from the northeast.[3]^:116 Two regiments from the 7th supported the main assault by the 341st Division. The ARVN 18th Division withstood the initial attacks and on 12 April were reinforced by men of the elite 1st Airborne Brigade and Vietnamese Marines.[3]^:117 By 16 April the battle was turning in favour of the PAVN and on 19 April the ARVN General Staff ordered the units defending Xuân Lộc to withdraw to defend Biên Hòa.[3]^:129-34 The 4th Corps pushed on towards Biên Hòa and at 5pm on 26 April they attacked Bien Hoa Air Base and Long Binh Post.[3]^:154 By the morning of April 28 troops from the 4th Corps overran ARVN positions at the eastern end of the Newport Bridge.[3]^:155

Today the division is part of the 4th Corps (Vietnam People's Army).