Sāzmān-i Chirīkʹhā-yi Fadāʼī-i Khalq-i Īrān

The Organization of Iranian People's Fedai Guerrillas (OIPFG; Persian: سازمان چريک‌های فدايی خلق ايران, romanized: Sâzmân-e Čerik-hâye Fadâyi-e Xalğ-e Irân), simply known as Fadaiyan-e-Khalq (Persian: فداییان خلق, romanized: Fadâ'iān-e Xalğ, lit. 'Devotees of the People') was an underground Marxist–Leninist guerrilla organization in Iran. The OIPFG was one of the most important and influential armed groups during the Iranian Revolution, although this organization failed to achieve its goal and lost many of its members, it had a great impact on some radical Iranian intellectuals of its generation. After its formation, the loyalists were able to carry out several important and noisy operations and assassinations, such as the Siahkal incident, the explosion of electricity pylons, the explosion of some police stations, the assassination of Major General Farsiu, the assassination of Mohammad Sadeq Fateh Yazdi, one of the largest factories in Iran, attacking and robbing government banks, and bombing the offices of American oil companies.