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.
Peter III of Russia
After his death, four fake Peters (five if Šćepan Mali of Montenegro is included) came forth, supported by revolts among the people, who believed in a rumor that Peter had not died but had been secretly imprisoned by Catherine. The most famous was the Cossack Yemelyan Pugachev, who led what came to be known as Pugachev's Rebellion in 1774, which was ultimately crushed by Catherine's forces. In addition, Kondratii Selivanov, who led a castrating sect known as the Skoptsy, claimed to be both Jesus and Peter III.