Bloody Sunday 1905 (Triggering event)- Hundreds of protesters were killed, riots and strikes broke out all over Russia

February Revolution 1917-removed Tzar Nicolas II from power

October Revolution (Bolsheviks Revolution) 1917-founded the Soviet Union.

Tsar Nicholas II was executed (1918)

February 1918. The Russians change their Calender from the Julian Calender to the Georgian Calender this shows that the Russians want change from when the Tsars were in power.