[6] On 22 September 1981, Iran began their first successful offensive against Iraq, in order to break the Siege of Abadan.The Iranians used their regular army supported by Revolutionary Guard[7] infantry, the former using small groups of armored vehicles with full artillery and air support (the Iranians succeeded in establishing air superiority in spite of limited numbers of aircraft and lack of spare parts).The main attack was preceded by the Iranian air force carrying out airstrikes against the Iraqi troops between the Bahmanshir and the east bank of the Karun.An Iranian armored battalion cut the enemy forces in two, while AH-1J SeaCobra helicopters destroyed numerous Iraqi tanks using TOW missiles.[8] The next phase of the battle came when the Iranians unleashed their 92nd Armored Division on the north side of the Iraqi positions on September 27.