Left-wing guerrilla groups of Iran

Several left-wing guerrilla groups attempting to overthrow the pro-Western regime of Shah Mohammad Reza Pahlavi were notable and active in Iran from 1971 to 1979. The groups shared a commitment to armed struggle, but differed in ideology. Most were Marxist in orientation. The largest group — People's Mujahedin of Iran — was founded as a left wing movement with the aim to overthrow Iran's cleric rule.

Four guerrilla organizations — the Feda'i, the pro-Tudeh Feda'i Munsh'eb, the Islamic Mujahedin and the Organization of Struggle for the Emancipation of the Working Class — are said to have "delivered the regime its coup de grace," in the street fighting of February 9–11, 1979.