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.
Catherine the Great
Grigory Potemkin was involved in the "coup d'état" of 1762. In 1772, Catherine's close friends informed her of Orlov's affairs with other women, and she dismissed him. By the winter of 1773, the Pugachev revolt had started to threaten. Catherine's son Paul had also started gaining support; both of these trends threatened her power. She called Potemkin for help—mostly military—and he became devoted to her.