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).
The Captain's Daughter
Masha understands why Pyotr wasn't able to defend himself and decides to go to St. Petersburg, to present a petition to the empress. In Tsarskoye Selo, she meets a lady of the court and details her plan to see the Empress on Pyotr's behalf. The lady refuses at first, saying that Pyotr is a traitor, but Masha is able to explain all the circumstances. Soon, Masha receives an invitation to see the Empress, and is shocked to recognize her as the lady she had talked to earlier. The Empress has become convinced of Pyotr's innocence and has ordered his release. Pyotr witnesses the beheading of Pugachev. He and Masha are married.