Riots amongst peasants and citizens of Moscow at this time were endemic, and included the Salt Riot (1648), Copper Riot (1662), and the Moscow Uprising (1682). By far the greatest peasant uprising in 17th-century Europe erupted in 1667. As the free settlers of South Russia, the Cossacks, reacted against the growing centralization of the state, serfs escaped from their landlords and joined the rebels. The Cossack leader Stenka Razin led his followers up the Volga River, inciting peasant uprisings and replacing local governments with Cossack rule. The tsar's army finally crushed his forces in 1670; a year later Stenka was captured and beheaded. Yet, less than half a century later, the strains of military expeditions produced another revolt in Astrakhan, ultimately subdued.