SSDF forces took part in an 1982 Ethiopian-Somali Border War against Siad Barre. The campaign was called off when the United States initiated emergency military aid to Somalia. However some territory, including two district towns, had come under Ethiopian and SSDF control. The Mengistu regime declared that the territory was part of Ethiopia, something which created problems in the relations between the Ethiopian government and SSDF. In any case, the action was swiftly repulsed, and according to the U.S. Department of State, resulted in severe reprisals against the Majeerteen clan; the SSDF itself would be implicated in killings of members of Siad's own Marehan clan, in Cel-Habred in the Galgadud region in the early 1980s. A conflict soon emerged between the former SSF and the more leftist members. The SSF clique wanted to maintain the domination of SSDF of Majeerteen and Darood clans. They made a deal with the Ethiopian government to purge the leftists. In 1984 the Mengistu government jailed many leading SSDF members, such as then colonel Abdullahi Yusuf Ahmed. In 1984, Mohamed Abshir Waldo was installed as provisional SSDF Chairman. From 1983 onwards many leaders, belonging to the Darood clan, were bought over by Barre. Many SSDF fighters defected to the regime. By 1985 SSDF had ceased most of their military operations against the Siad Barre regime. In 1986 an SSDF congress was held, which elected Dr. Hassan Ali Mire as chairman. He resigned in 1988, leaving a power vacuum in the organization. Musse Islan was elected leader by the SSDF Central Committee to hold the position until a Congress was convened. In 1988 the governments of Somalia and Ethiopia made some agreements to cease hostilities. The Ethiopian government started closing SSDF camps, arresting its leaders and seizing weapons. The Ethiopian government also closed the SSDF radio station, Radio Halgan, which had been broadcasting since 1981. In 1988 SSDF guerrillas started taking control over the western districts of Mudug and the southern areas of Nugaal and Bari regions. Post-1991 After the fall of the Barre regime, the SSDF (based largely in northeastern Somalia) was divided in two factions. One was led by General Mohamed Abshir Muse (chairman), who at the time was based in Saudi Arabia, and the other was led by Abdullahi Yusuf Ahmed (deputy chairman). The general secretary was Mohamed Abshir Waldo. A congress was held in August 1994. Former Prime Minister of Somalia, Abdirizak