Yemelyan Pugachev
Yemelyan Ivanovich Pugachev () (c. 1742 – ) was a Russian Cossack who led a great popular insurrection during the reign of Catherine the Great, claiming to be her late husband, Emperor Peter III. Alexander Pushkin wrote a notable history of the rebellion, "The History of Pugachev", and he recounted some of the events in his novel "The Captain's Daughter" (1836).
Cossacks
By the 18th century Cossack hosts in the Russian Empire occupied effective buffer zones on its borders. The expansionist ambitions of the Empire relied on ensuring the loyalty of Cossacks, which caused tension given their traditional exercise of freedom, democracy, self-rule, and independence. Cossacks such as Stenka Razin, Kondraty Bulavin, Ivan Mazepa and Yemelyan Pugachev led major anti-imperial wars and revolutions in the Empire in order to abolish slavery and odious bureaucracy and to maintain independence. The empire responded with ruthless executions and tortures, the destruction of the western part of the Don Cossack Host during the Bulavin Rebellion in 1707–08, the destruction of Baturyn after Mazepa's rebellion in 1708, and the formal dissolution of the Lower Dnieper Zaporozhian Host in 1775, after Pugachev's Rebellion.