have been delivered. The IISS emphasised that 'spares are short and not all equipment is serviceable.' The U.S. Army Area Handbook for Somalia, 1977 edition, agreed that the army comprised six tank and nine mechanised infantry battalions, but listed no infantry battalions, the two commando battalions, five field artillery, and five anti-aircraft battalions. Three divisions (Division 21, Division 54, and Division 60) were formed, and later took part in the Ogaden War. There is evidence that the divisions were formed as early as 1970; Mohamud Muse Hersi has been listed by somaliaonline.com as commander of the 21st Division from 1970 to 1972, and Muse Hassan Sheikh Sayid Abdulle as commander 26th Division in 1970–71. Under the leadership of General Abdullah Mohamed Fadil, Abdullahi Ahmed Irro and other senior Somali military officials formulated a plan of attack for what was to become the Ogaden War in Ethiopia. This was part of a broader effort to unite all of the Somali-inhabited territories in the Horn region into a Greater Somalia (Soomaaliweyn). At the start of the offensive, the SNA consisted of 35,000 soldiers, and was vastly outnumbered by the Ethiopian forces. Somali national army troops seized the Godey Front on 24 July 1977, after Division 60 defeated the Ethiopian 4th Infantry Division. Godey's capture allowed the Somali side to consolidate its hold on the Ogaden, concentrate its forces, and advance further to other regions of Ethiopia. The invasion reached an abrupt end with the Soviet Union's sudden shift of support to Ethiopia, followed by almost the entire communist world siding with the latter. The Soviets halted supplies to Barre's regime and instead increased the distribution of aid, weapons, and training to Ethiopia's newly communist Derg regime. General Vasily Petrov was assigned to restructure the Ethiopian Army. The Soviets also brought in around 15,000 Cuban troops to assist the Ethiopian military. By 1978, the Somali forces were pushed out of most of the Ogaden, although it would take nearly three more years for the Ethiopian Army to gain full control of Godey. A key organisational change happened during the war. Battalions were succeeded by brigades. "During the war the standard infantry and mechanized infantry unit became the brigade, two to four battalions and having a total strength of 1,200 to 2,000." Also following the war, Abudwak became the base for Division 21. Decline and collapse, 1978–1991 The shift in support by the Soviet