Explore 1919-09-07
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Mexican Revolution 1910-11-20 - 1920-12-01
Russian Revolution 1917-03-08 - 1923-06-16
Russian Civil War 1917-11-07 - 1923-06-16
Biennio Rosso 1919-01-01 - 1920-12-31
Polish–Soviet War 1919-02-14 - 1921-03-18
Polish–Lithuanian War 1919-05-03 - 1920-11-29