Conflicts and tensions in a country may result in clashes and war. Nigeria experienced the effects of such tensions during the Civil war and after the war.
The Biafran War took place from July 1967 till January 1970, was an ethnic and political conflict caused by the attempted secession of the southeastern provinces of Nigeria as the self proclaimed Republic of Biafra.
The conflict was the result of economic, ethnic, cultural and religious tensions mainly between the Hausas of the north and the Igbo of the east of Nigeria.
Over 1 million civilians died as an effect of the war. The ensuing battles and well-publicized human suffering prompted international outrage and intervention.
withinnigeria.com/8 May 2019