Answer
General Johann von Michelsohnen defeated Pugachev's rebellion. The rebellion, which lasted from 1773 to 1775, was a major uprising against the Russian Empire led by Yemelyan Pugachev, a Don Cossack who claimed to be Peter III, the deposed emperor. The rebellion began in the Volga region and spread to other parts of the empire, but was eventually defeated by Russian forces led by Michelsohnen.