In the aftermath of the Ogaden debacle, a group of disgruntled army officers attempted a coup d'état against the regime in April 1978. Their leader was Colonel Mahammad Shaykh Usmaan, a member of the Majeerteen clan. The coup failed and seventeen alleged ringleaders, including Usmaan, were summarily executed. All but one of the executed were of the Majeerteen clan. One of the plotters, Lieutenant Colonel Abdillaahi Yuusuf Ahmad, a Majeerteen, escaped to Ethiopia and founded an anti-Siad Barre organization initially called the Somali Salvation Front (SSDF; later the Somali Salvation Democratic Front, SSDF) (see Sources of Opposition , ch. 5). During their preeminence in the civilian regimes, the Majeerteen had alienated other clans. Thus, when Siad Barre sent the Red Berets against the Majeerteen in Mudug Region, other clans declined to support them.

The Red Berets systematically smashed the small reservoirs in the area around Galcaio so as to deny water to the Umar Mahamuud Majeerteen sublineages and their herds. In May and June 1979, more than 2,000 Umar Mahamuud, the Majeerteen sublineage of Colonel Ahmad, died of thirst in the waterless area northeast of Galcaio, Garoowe, and Jerriiban. In Galcaio, members of the Victory Pioneers, the urban militia notorious for harassing civilians, raped large numbers of Majeerteen women. In addition, the clan lost an estimated 50,000 camels, 10,000 cattle, and 100,000 sheep and goats.