Operation Samen-ol-A'emeh

BelligerentsIraqIranCommanders and leadersSaddam Hussein
Gen. Juwad ShitnahRuhollah KhomeiniUnits involvedAbuzar Brigade
77th Infantry Division of Khorasan
36th Armoured Brigade of Shiraz
Navy's Takavar Battalion
Separate brigades from IRGC
Local volunteers
IRIAA
IRIAFStrength 50,000–60,000 troops
numerous armoured vehicles
200 artillery pieces 15,000 troops (inside Abadan)
20,000–30,000 troops outsideCasualties and losses 3,000 killed
1,656 captured
90 tanks/APCs destroyed
100 vehicles destroyed
3 aircraft destroyed
1 helicopter destroyed
100 tanks, 40 APCs, 3 loaders, 150 vehicles captured 3,000 killed
150 tanks destroyed
9 AH-1J destroyed
2 CH-47 destroyed
3 Bell-214 destroyed

Operation Samen-ol-A'emeh (Persian: عملیات ثامن‌الائمه, lit.'Operation Eighth Imam') was an Iranian offensive and operation in the Iran–Iraq War between 27–29 September 1981 where Iran broke the Iraqi Siege of Abadan. The operation was carried out by the Iranian army joined by the Islamic Revolutionary Guard Corps.