The Ogaden War 1977-1978

State entry Exit combat force population Losses
Cuba 1975 1987 15000 8700000 2000
Ethiopia 1964 1987 217000 42000000 15000
Rebels 1964 1987 50000 1000000 5000
Somalia 1964 1987 50000 5000000 15000

The SNA"Somalia National Army" never recovered from its defeat in the Ogaden War. The battles to retake and then defend the Ogaden stripped the Somali armed forces of many troops, much of their equipment, and their Soviet patron. For the next decade, the SNA sought unsuccessfully to improve its capability by relying on a variety of foreign sources, including the United States. The Ogaden War therefore remains the best example of the SNA's ability to mount and sustain conventional military operations.
Before the Ogaden War, the most striking feature of the 23,000-man SNA had been its large armored force, which was equipped with about 250 T-34 and T-54/T-55 Soviet-built medium tanks and more than 300 armored personnel carriers. This equipment gave the SNA a tank force more than three times as large as Ethiopia's. The prewar SAF also was larger than Ethiopia's air force. In 1976 the SAF had fifty-two combat aircraft, twenty-four of which were Soviet-built supersonic MiG21s . Facing them was an Ethiopian Air Force (EAF) of thirty-five to forty aircraft. Ethiopia also was in the process of acquiring several United States-built Northrop F-5 fighters from Iran. At the outbreak of fighting, Ethiopia had approximately sixteen F5A /Es.
After the Somali government committed the SNA to the Ogaden, the conflict ceased to be a guerrilla action and assumed the form of a conventional war in which armor, mechanized infantry, and air power played decisive roles. The SNA quickly adapted its organization to battlefield realities. The centralized Somali logistics system controlled supplies at battalion level (600- to 1,000-man units) from Mogadishu, an unwieldy arrangement given Somalia's limited transportation and communications network. To facilitate operations, the logistics center and headquarters for forces fighting in the northern Ogaden moved to Hargeysa, the SNA's northern sector headquarters. Before the war, all Somali ground forces had been organized into battalions. After the conflict started, however, the standard infantry and mechanized infantry unit became the brigade, composed of two to four battalions and having a total strength of 1,200 to 2,000 personnel.
Somalia's greatest victory occurred in mid-September 1977 in the second attempt to take Jijiga, when three tank battalions overwhelmed the Ethiopian garrison. After inflicting some heavy losses on Somali armor, Ethiopian troops mutinied and withdrew from the town, leaving its defense to the militia, which was incapable of slowing the Somali advance. The Ethiopians retreated beyond the strategic Marda Pass, the strongest defensive position between Jijiga and Harer, leaving the SNA in a commanding position within the region. Despite this success, several factors prevented a Somali victory. Somali tank losses had been heavy in the battles around Dire Dawa and Jijiga. Moreover, because the EAF had established air superiority over the SAF, it could harass overextended Somali supply lines with impunity. The onset of the rainy season hampered such air attacks; however, the bad weather also bogged down Somali reinforcements on the dirt roads.

After watching Ethiopian events in 1975-76, the Soviet Union concluded that the revolution would lead to the establishment of an authentic Marxist-Leninist state and that, for geopolitical purposes, it was wise to transfer Soviet interests to Ethiopia. To this end, Moscow secretly promised the Derg military aid on condition that it renounce the alliance with the United States. Mengistu, believing that the Soviet Union's revolutionary history of national reconstruction was in keeping with Ethiopia's political goals, closed down the U.S. military mission and the communications centre in April 1977. In September, Moscow suspended all military aid to the aggressor, began openly to deliver weapons to Addis Ababa, and reassigned military advisers from Somalia to Ethiopia. This Soviet volte-face also gained Ethiopia important support from North Korea, which trained a People's Militia, and from Cuba and the People's Democratic Republic of Yemen, which provided infantry, pilots, and armoured units. By March 1978, Ethiopia and its allies regained control over the Ogaden.

Mengistu's government was unable to resolve the Eritrean problem, however, and expended large amounts of wealth and manpower on the conflict while rebellion spread to other parts of Ethiopia. Similarly, Siyaad proved unable to return the Ogaden to Somalian rule, and the people grew restive; in northern Somalia, rebels destroyed administrative centres and took over major towns. Both Ethiopia and Somalia had followed ruinous socialist policies of economic development, and they were unable to surmount droughts and famines that afflicted the Horn during the 1980s. In 1988 Siyaad and Mengistu agreed to withdraw their armies from possible confrontation in the Ogaden..