tactics used by Portugal, Rhodesia and South Africa had many similar characteristics. The air forces of the three countries also used the same types of helicopters (mainly Alouette III and later, regarding Portugal and South Africa, SA 330 Puma), and there were military cooperation agreements and sharing of experience between the three powers, including the secret Alcora Exercise. Portuguese, Rhodesian and South African airmobile tactics often involved air assaults done by small units of special forces or light infantry, transported in four or five Alouette III helicopters. Assaults were often supported by an Alouette III armed with a side-mounted 20 mm MG 151 autocannon. This helicopter was nicknamed Helicanhão (heli-cannon) by the Portuguese and K-Car by the Rhodesians. Variants of the air mobile warfare tactics used in Africa included the Rhodesian Fireforce and the Portuguese heliborne-horseborne forces cooperation. Bangladesh Liberation War (1971) Meghna Heli Bridge was an aerial operation of Indian and Bangladeshi allied forces during the Bangladesh Liberation War in 1971. It took place on 9 December, when the Indian Air Force airlifted the Mukti Bahini and the IV Corps of the Indian Army from Brahmanbaria to Raipura in Narsingdi over the River Meghna, bypassing the destroyed Meghna Bridge and Pakistani defences in Ashuganj. Post Cold War In the United States Army, the air assault mission is the primary role of the 101st Airborne Division (Air Assault). This unit is a division-sized helicopter-borne fighting force. 101st Airborne Division soldiers attend the Sabalauski Air Assault School. Graduates are qualified to insert and extract using fast rope and rappel means from a hover in addition to the ordinary walk on and off from an airlanded helicopter. In addition, all U.S. Marine Corps divisions are capable of, and routinely train for and perform, air assault operations. Forward-deployed Marine Corps infantry battalions/regiments (reinforced, organized, and designated as Battalion Landing Teams/Regimental Combat Teams, or BLTs and RCTs, respectively), form the Ground Combat Element (GCE) of a Marine Expeditionary Unit (MEU), or Marine Expeditionary Brigade (MEB). These MEUs and MEBs are capable of embarking aboard amphibious warships and include air assault as one of several means of conducting amphibious landing operations, supported by embarked Marine Corps tilt-rotor, helicopter, and STOVL fixed-wing strike aircraft. The 10th Mountain Division Light Infantry has a limited capability to perform air assault operations. On September 19, 1994, the 1st Brigade of the 10th Mountain Division conducted the Army's first air