Battle of Gumbinnen
Part of East Prussian Operation, Eastern Front of World War I
Date 20 August 1914
Location Gumbinnen, East Prussia
Result Russian victory
Flag of Russia Russia Flag of the German Empire Germany
Commanders and leaders
Flag of Russia Nikolai Dukhonin

Flag of Russia Alexander Samsonov

Flag of the German Empire Maximilian von Prittwitz
Units involved
I Army VIII Army
192,000 148,000
Casualties and losses
16,891 killed, wounded, or missing 20,437 killed, wounded, or missing

The Battle of Gumbinnen was an engagement on 20 August 1914 between the Russian Empire and the German Empire, during the East Prussian offensive.