Battle of Gumbinnen

Battle of Gumbinnen
Part of Russian invasion of East Prussia during Eastern front

Eastern Front, 17–23 August 1914.
Date20 August [O.S. 7 August] 1914
Location54°36′N 22°12′E / 54.600°N 22.200°E / 54.600; 22.200
Result Russian victory
Belligerents
German Empire Russian Empire
Commanders and leaders
Maximilian von Prittwitz
August von Mackensen
Paul von Rennenkampf
Units involved
8th Army 1st Army
Strength
74,400 men
224 machine guns and 408 guns
63,800 total
252 machine guns and 408 guns
Casualties and losses
14,607 18,839
Another estimate:
19,665 men, including 9,500 captured

The Battle of Gumbinnen, initiated by forces of the German Empire on 20 August 1914, was a German offensive on the Eastern Front during the First World War. Because of the hastiness of the German attack, the Russian Army emerged victorious.