Sventiany Offensive

The Sventiany Offensive (now Švenčionys) was a military operation mostly undertaken by the 10th German Army against the Russian 10th Army as part of the Eastern Front during World War I. On 9 September 1915 four German cavalry divisions, reinforced from 13 September by two others, filled the gap in the Russian front and deployed an attack to gain the rear of 10th Russian army.

Sventiany (Švenčionys) Offensive
Part of the Eastern Front during World War I
Eastern Front in the second half of 1915.
Date 26 August (N.S. 8 September) to 19 September (N.S. 2 October), 1915 Location Sventiany, Russian Empire (Now Švenčionys, Lithuania) 55°09′N 26°10′E Result Russian victory
Belligerents
German Empire	Russian Empire
Commanders and leaders
Hermann v. Eichhorn	Alexei Evert Yevgeniy Radkevich Pavel Plehve
Units involved
German 10th Army	Russian 10th Army Russian 5th Army

On 9 September the Germans broke the Russian defence and six cavalry divisions were thrown into breach. Later the German onslaught, devoid of infantry and artillery support, weakened and on 15–16 September was finally stopped by the newly formed 2nd Russian army. On October 2 the Sventiany breach was eliminated. Russia was victorious and Germany was pushed out.