What happened to cause Russia to leave the Allied Powers in WWI?

1 Answer
Peter
Jan 13, 2016

The Russian Revolution of 1917.

Explanation:

Russia had entered the war as an ally of Serbia, the country Austria-Hungary first declared war upon. The Russian army was in a miserable state right from the beginning. The army was plagued by desertions, bad leadership, poor communications and a general lack of supplies.

When Lenin took power he pulled Russia out of WW1.

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