Battle_of_Tannenberg (Wikipedia)
Battle of Tannenberg
Part of the Eastern Front of World War I
Russian prisoners tannenberg.jpg
Russian prisoners of war after the Battle of Tannenberg.
Date 26–30 August 1914
Location Near Allenstein, East Prussia (today Olsztyn, Poland)
53°29′45″N 20°08′4″E / 53.49583°N 20.13444°E / 53.49583; 20.13444Coordinates: 53°29′45″N 20°08′4″E / 53.49583°N 20.13444°E / 53.49583; 20.13444
Result German victory
 German Empire  Russian Empire
Commanders and leaders
German Empire Paul von Hindenburg
German Empire Erich Ludendorff
German Empire Max Hoffmann
German Empire Hermann von François
Russian Empire Alexander Samsonov
Russian Empire Paul von Rennenkampf
Units involved
German Empire Eighth Army Russian Empire Second Army
150,000 230,000
Casualties and losses

10,000–15,000 killed or wounded
12,000 killed or wounded

Official German data 21–30/08/14:
1,726 KIA
7,461 WIA
4,686 MIA
78,000 killed or wounded
92,000 POW
350 guns captured
Vivat ribbon commemorating Battle of Tannenberg. Shows Wilhelm II and "Hindenburg the victor of Tannenberg".

The Battle of Tannenberg was fought between Russia and Germany from 26–30 August 1914, during the first month of World War I. The battle resulted in the almost complete destruction of the Russian Second Army and the suicide of its commanding general, Alexander Samsonov. A series of follow-up battles (First Masurian Lakes) destroyed most of the First Army as well and kept the Russians off balance until the spring of 1915. The battle is particularly notable for fast rail movements by the Germans, enabling them to concentrate against each of the two Russian armies in turn, and also for the failure of the Russians to encode their radio messages. It brought high prestige to Field Marshal Paul von Hindenburg and his rising staff-officer Erich Ludendorff.

Although the battle actually took place near Allenstein (Olsztyn), Hindenburg named it after Tannenberg, 30 km to the west, in order to, in German eyes, avenge the defeat of the Teutonic Knights 500 years earlier at the Battle of Grunwald (which was always known as the Battle of Tannenberg in German).

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