Abagana Ambush of March 31, 1968 was an ambush by Biafran guerrilla troops led by Major Jonathan Uchendu that wiped out the Nigerian 2 Division. During this ambush, the Nigerian Army suffered the heaviest defeat in the civil war. Of the 5,000 Nigerian troops ambushed, only a very small number survived, including the 2nd Division’s commander, Col. Murtala Ramat Muhammed.