In the aftermath of the official establishment of the Army of the Guardians of the Islamic Revolution, there were four factions within it; these factions were included in the Command and Central Councils, with the greates influence exercised by the Mojahedin of the Islamic Revolution Organization. Members of the Mojahedin of the Islamic Revolution Organization in the IRGC used their positions against the People's Mujahedin of Iran, Tudeh and Fadai in the general campaign against the political left and ethnic minorities, where the left was strong. In September 1979, the IRGC were entrusted with providing security detail to Friday congregational prayer leader Ayatollah Montazeri, while failed to resist Iranian students in the seizure of the U.S. Embassy in Tehran. The 1979 Iranian constitution gave Khomeini the supreme command of all armed forces, including the IRGC.