After a revolution in 1952, the Nationalist Revolutionary Movement introduced nationalization of the tin mines, agrarian reform and a universal franchise. A military coup in 1964 led to the regime of General Barrientos, which after a confrontation with the miners, dismantled worker power, whilst cultivating the peasantry. Guerrilla resistance (which Che Guevara tried to foster) developed during the 1960s. Manifestations of mass discontent in 1971 led to planned destabilization by the right, the overthrow of the leftist government of General Torres (1970-71) and the imposition of the rightwing Banzer dictatorship from 1971 to 1978. Banzer consolidated support by granting extensive rights to large landowners.