The Revolutionary Left Movement (, MIR) is a Chilean left-wing political organization and former urban guerrilla organization founded on October 12, 1965. At its height in 1973, the MIR numbered about 10,000 members and associates. The group emerged from various student organizations, mainly from University of Concepción (led by Miguel Enríquez), that had originally been active in the youth organization of the Socialist Party. They established a base of support among the trade unions and shantytowns of Concepción, Santiago, and other cities. Andrés Pascal Allende, a nephew of Salvador Allende, president of Chile from 1970 to 1973, was one of its early leaders. Miguel Enríquez Espinosa was the General Secretary of the party from 1967 until his assassination in 1974 by the DINA.