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March & November 1917Reputable source · 2 sourcesWell documented

The Russian Revolution

On the timeline · around March & November 1917 · The Russian Revolution1918

What happened

In 1917 Russia was convulsed by two revolutions: the February Revolution forced Tsar Nicholas II to abdicate, and in the October (November) Revolution the Bolsheviks under Lenin seized power. The new Soviet government sought to pull Russia out of the war.

Why it matters

The revolution removed Russia — the Allies' great eastern partner — from the war and created the world's first communist state, reshaping the twentieth century.

Sources