✦ History

Part of World War I

First Battle of the Masurian Lakes

September 7–14, 1914 · First Battle of the Masurian Lakes

Result German victory

The German Eighth Army drove the Russian First Army out of East Prussia.

On the map Contemporaries

Allies

Central Powers

Other

Russian Empire
German Empire
Paul von Rennenkampf military commander
Paul von Hindenburg military commander Erich Ludendorff military commander August von Mackensen military commander

Strength and losses

Casualties
100,000–125,000
Killed
1,555
Wounded
10,412
Missing
1,552
Guns
1,146

Units

10th Army (Russian Empire) 1st Army (Russian Empire)
8th Army (German Empire) Guards Reserve Corps I Reserve Corps (German Empire) XVII Corps (German Empire) XX Corps (German Empire) 1st Cavalry Division (German Empire) 22nd Division (German Empire) 2nd Division (German Empire) 35th Division (German Empire) 36th Division (German Empire) 37th Division (German Empire) 38th Division (German Empire) 41st Division (German Empire) 8th Cavalry Division (German Empire)
I Corps (German Empire) XI Corps (German Empire) 1st Division (German Empire)