rebellions against slavery and serfdom, most often in conjunction with Cossack uprisings, such as the uprisings of Ivan Bolotnikov (1606-1607), Stenka Razin (1667-1671), Kondraty Bulavin (1707-1709), and Yemelyan Pugachev (1773-1775), often involving hundreds of thousands and sometimes millions. Between the end of the Pugachev rebellion