Pugachev's Rebellion
Pugachev's Rebellion (Peasants' War 1773-75, Cossack Rebellion) of 1773-75 was the principal revolt in a series of popular rebellions that took place in the Russian Empire after Catherine II seized power in 1762. It began as an organized insurrection of Yaik Cossacks headed by Yemelyan Pugachev, a disaffected ex-lieutenant of the Imperial Russian Army, against a background of profound peasant unrest and war with the Ottoman Empire. After initial success, Pugachev assumed leadership of an alternative government in the name of the assassinated Tsar Peter III and proclaimed an end to serfdom. This organized leadership presented a challenge to the imperial administration of Catherine II.
Left-wing uprisings against the Bolsheviks
The main rebel force was a detachment commanded by Dmitry Ivanovich Popov, a Left S.R. and member of the Cheka. About 1,800 revolutionaries took part in the insurrection, bombarding the Moscow Kremlin with artillery and seizing the telephone exchange and telegraph office. During the two days that they remained in control there, they sent out several manifestos, bulletins and telegrams in the name of the Left S.R. Central Committee declaring that the Left S.R.s had taken over power and that their action had been welcomed by the whole people. The Fifth Congress of Soviets instructed the government to suppress the insurrection at once, and the group of Left S.R.s at the Congress was arrested.