In November 1917 Lenin and the Bolsheviks took over the Winter Palace.
Explanation:
On October 25, 1917 (Nov. 7 in the Gregorian calendar), the Bolsheviks, led by Vladimir Lenin, succeeded in storming the Winter Palace, seat of government, and several other public departments. They formed a new government based on the soviets and centralized by the Council of People's Commissars. The Bolshevik Revolution began with this act, which was a period of conflict, begun in 1917, which overthrew the Russian monarchy and brought to power the Bolshevik Party of Vladimir Lenin.
I think it may have had something to do with Brit and France helping them win the war. Thus it made them as a fall back or cushion for the ottoman empire because they felt that they where able to rely on them now.
