Incited ostensibly to free the serfs, it began when its namesake claimed to be Peter III, the ousted husband of the Russian monarch.  
This event was precipitated by the failure of the Legislative Commission and lasted as long as it did because of war with the Ottomans, whose end by the Treaty of Kuchuk Kainarji.  It was finally brought to a halt by Suvarov, who brutally put down this uprising of Ural Cossacks and disaffected soldiers.  Incited ostensibly to free the serfs, it began when its namesake claimed to be Peter III, the ousted husband of the Russian monarch.  FTP, identify this 1773-75 rebellion that almost overthrew Catherine the Great.
This event was precipitated by the failure of the Legislative Commission and lasted as long as it did because of war with the Ottomans, whose end by the Treaty of Kuchuk Kainarji.  
Pugachev's Rebellion