Battle of Masurian Lakes

Type of action: Ground battle in World War I

Date: September 9-14, 1914

Location: East Prussia (later Mazury region, Poland)

Combatants: 145,000 Germans vs. 200,000 Russians

Principal commanders:German, General Paul von Hindenburg (1847–1934), General Erich Ludendorff (1865–1937); Russian, General Pavel Rennenkampf (1854–1918)

Result: Russian withdrawal ending invasion of East Prussia

Following its stunning defeat of the Russian Second Army at the Battle of Tannenberg in the end of August, 1914, the German Eighth Army, commanded by Generals Paul von Hindenburg and Erich Ludendorff, advanced northeast against the Russian First Army, which had remained inactive during Tannenberg. The German plan was to turn the Russian left flank and, sweeping around behind the Russians, trap them against the Baltic coast and annihilate them.

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German general Hermann von Franois’s First Corps began to attack General Pavel Rennenkampf’s southern positions on September 7. Following fierce fighting and fearing encirclement, Rennenkampf began withdrawing on September 9. By September 14, East Prussia had been cleared of Russian troops.

Significance

While failing to trap the Russian First Army, the Germans were ultimately successful in repelling the Russian invasion of East Prussia. In only one week, the German Eighth Army killed, wounded, or captured 125,000 men in Rennenkampf’s First Army and captured 150 of his guns and most of his transports, while losing a relatively light 15,000 men. Overall in the one-month campaign in East Prussia, the Russian First and Second Armies lost 227,000 soldiers, the majority of them captured (Russian casualty figures at Tannenberg are unrecorded), along with 650 guns captured by the Germans. The German Eighth Army suffered only around 30,000 casualties.

Bibliography

Clark, Alan. Suicide of the Empires: The Battles on the Eastern Front, 1914–1918. New York: American Heritage Press, 1971.

Stone, Norman. The Eastern Front, 1914–1917. Reprint. London: Penguin, 1998.