The Cheka was created in December 1917 to find and destroy any opposition.
This was short for "Extraordinary Commission against Counter-Revolution and Sabotage."
Dzerzhinsky led the Cheka and it was ruthless in pursuing perceived enemies of the Bolsheviks.
Each region in Russia soon had its own branch of the Cheka and across the country, thousands were arrested, many more tortured or killed.
The Cheka and the Red Army crushed any protestors against the disbanding of the Constituent Assembly in January 1918.
During the Civil War, the Cheka grew in size and influence which unleashed a period of heightened violence and repression often referred to as the "Red Terror".