Wọ́n bí Abdullahi ní ọjọ́ Kẹ́ta Oṣù Kẹ́ta, ọdún 1939,(3, March 1939-9 July 2019). Òun ni Ọ̀gágun Àgbà Awoko-Ogun (tfyt), tí Ó sì fìgbà kan jẹ́ Gómìnà Ìpínlẹ̀ Bendel, tẹ́lẹ̀ nílẹ̀ Nàìjíríà látlati oṣù kẹ́ta ọdún 1976 sí oṣù Kéje ọdún 1978 nígbà ìṣèjọba Ológun Ọ̀gágun Olúṣẹ́gun Ọbásanjọ́.
General Olusegun Obasanjo became head of state in Nigeria on 14 February 1976 after the assassination of General Murtala Mohammed. He replaced or re-assigned many of the state governors, and broke up some of the larger states into two or three new states. Obasanjo began the transition to democracy with the Nigerian Second Republic, allowing the election of governors who replaced the military appointees in October 1979.