German General Paul von Hindenburg luring a Russian army into the Masurian Lakes. In the Battle of Tannenberg, the Germans destroyed the Russian Second Army, killing 50,000 and taking 90,000 prisoners. The Russian First Army managed to escape the same fate in the First Battle of the Masurian Lakes. The postcard was sent from France September 11, 1915.

Reverse:
Die masurische Falle.
The Masurian trap.
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