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).
Ural Cossacks
Yaik Cossacks were the driving force in the rebellion led by Yemelyan Pugachev in 1773-1774.
Their main livelihood was fishery and the taxation on it was a major source of friction between the Cossacks and the state. A revolt broke out in 1772, marked by the murder of General von Traubenberg. Traubenberg headed a commission which was to investigate and settle Cossack complaints and grievances, but his behaviour only antagonized them further. In reprisal, many were arrested, executed and outlawed. Pugachev appeared shortly after and managed to rally them to his cause.