East Prussia Campaign (13 agos 1914 año – 13 sept 1914 año)

Descripción:

The Russians invaded exposed German East Prussia with their First Army from the east and their Second Army from the south, although these two armies did not advance in unison. A small German victory at Stalluponen (17 August) and a larger German defeat at Gumbinnen (20 August) delayed the Russian First Army. General Maximilian von Prittwitz, the German Eighth Army commander, was shaken by Gumbinnen and ordered a general retreat to the Vistula River.

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