 As promised to the Russian peoples in October 1917, the Bolsheviks quit Russia's participation in the Great War on 3 March 1918.That same year, the Bolsheviks consolidated government power by expelling the Mensheviks, the Socialist Revolutionaries and the Left Socialist-Revolutionaries from the soviets.The Bolshevik government then established the Cheka (All-Russian Extraordinary Commission) secret police to eliminate anti–Bolshevik opposition in the country.