The Abubakar administration dissolved the prior electoral body (NECON) and established the Independent National Electoral Commission (INEC), which would organize the sequence of elections leading to the Fourth Republic.
Military ruler General Sani Abacha died suddenly, triggering a leadership succession and accelerating uncertainty around the planned transition from military rule.
Major General Abdulsalami Abubakar was sworn in as Nigeria’s new military head of state, positioning his regime to reset the transition program toward civilian rule.
Chief M. K. O. Abiola—widely regarded as the winner of Nigeria’s annulled 1993 presidential election—died while detained, sharpening domestic and international pressure for a credible democratic transition.
In a national broadcast, Abubakar pledged a return to democracy, including a schedule culminating in a civilian handover on 1999-05-29, and steps to allow political association and party formation.
Nigeria held local government and area council elections as the first nationwide poll of the transition period, testing electoral logistics and party mobilization ahead of state and federal elections.
Elections for governors and state houses of assembly took place across the federation, filling key subnational offices before the federal legislative and presidential contests.
Voters elected members of the Senate and House of Representatives, establishing the legislature that would operate under the Fourth Republic’s constitutional framework.
Nigeria held its presidential election; Olusegun Obasanjo (PDP) defeated Olu Falae (AD–APP coalition), setting the stage for the first civilian presidency after years of military rule.
The Constitution of the Federal Republic of Nigeria (1999) was promulgated (commonly associated with Decree No. 24 of 1999), providing the constitutional basis for the Fourth Republic and the impending civilian handover.
Power transferred from the military government to an elected civilian administration; Olusegun Obasanjo was sworn in as president, marking the start of Nigeria’s Fourth Republic.
The newly elected federal legislature convened for its first sitting early in the Fourth Republic, completing the institutional handover to civilian constitutional governance.
1999 transition and the founding of the Fourth Republic (1998–1999)
