Following the death of Juan Domingo Perón in 1974, the presidency of Argentina was assumed by his widow Isabel Martínez de Perón. Far from ceasing their opposition to the government, the People's Revolutionary Army (Ejército Revolucionario del Pueblo/ERP) and Montoneros stepped up their armed campaign to overthrow the government and replace it with a revolutionary Marxist-Leninist regime. Despite authorising Operativo Independencia (Operation Independence) Isabel Perón would ultimately be deposed by her own generals and the anti-guerilla campaign would descend into the so-called Dirty War.