In the aftermath of the Ogaden War, 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, which resides mostly in northeastern Somalia. 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 Abdullahi Yusuf Ahmed escaped to Ethiopia and founded an anti-Siad Barre organization initially called the Somali Salvation Front (SSF; later the Somali Salvation Democratic Front, SSDF).