On December 31, 1983 the Nigerian military under Major General Muhammadu Buhari overthrew the elected government of President Shehu Shagari, ending Nigeria's Second Republic after just over four years of civilian rule. Shagari had won a second term in the disputed 1983 elections, but his government was widely seen as corrupt and had presided over a severe economic crisis amid the global oil glut. On December 31, 1983 senior officers seized power in a largely bloodless coup, detaining Shagari and installing Buhari, the commander of the 3rd Armored Division, as head of state.
One officer, Brigadier Ibrahim Bako, was killed during an attempt to arrest Shagari. Buhari suspended the constitution, dissolved the National Assembly, and launched an anti-corruption and War Against Indiscipline campaign, jailing many former officials.
Researched Details
Researched
Independent research, added record by record. Hover any label for what it means.
Target identified in Coup Atlas research: President Shehu Shagari, overthrown on December 31, 1983 by the military under Buhari; he was detained and placed under house arrest.
RESEARCHED NAME
Key figures
Shehu Shagari (elected president overthrown)
Muhammadu Buhari (major general installed as head of state)
Sources
A military coup took place in Nigeria on 31 December 1983, coordinated by key officers of the Nigerian military, leading to the ousting of the democratically elected government of President Shehu Shagari and the installation of Major General Muhammadu Buhari as head of state.
On 31 December 1983 a group of senior army officers led by Major General Muhammadu Buhari overthrew Shagari's government in a bloodless coup, and during the takeover Brigadier Ibrahim Bako died while attempting to arrest Shagari, reportedly the only casualty, after which soldiers detained Shagari and placed him under house arrest.
SOURCE REVIEWEDHistorical Nigeria, Shehu Shagari's Government and the 1983 Coupopen source ↗
Dissatisfaction with dismal economic conditions and what the military perceived as corrupt politicians led to a military coup on December 31, 1983, and Buhari was chosen unanimously to be the new head of state, having served as military head of state in 1984 to 1985 before being elected president in 2015.
General Lansana Conte and General Buhari were among the African military leaders of the period, with Buhari on December 31, 1983 toppling the civilian regime of President Shehu Shagari, ending Africa's most populous nation's experiment in civilian government after only four years, and Shagari and dozens of Cabinet ministers and civil servants were jailed awaiting trial on corruption charges.
SOURCE REVIEWEDUPI Archives, Recent coups in Africaopen source ↗
Editorial Note
Fate coding: the deposed president Shehu Shagari was detained and placed under house arrest, matching the dataset's arrested-or-jailed fate; sources note that Shagari and many former officials were jailed pending corruption trials, though Shagari himself was later cleared of personal corruption and banned from politics. Coding note: the dataset labels this a military coup, accurately, led by senior officers with Major General Muhammadu Buhari installed as head of state. Historical weight recorded: the coup ended Nigeria's Second Republic, the return to civilian rule that had begun in 1979 after long military rule. One death recorded: Brigadier Ibrahim Bako was killed during the operation, reportedly the only fatality, though one scholarly source notes unverified reports of a larger firefight at the presidential lodge; this discrepancy is recorded rather than resolved, and it does not change the deposed president's fate. Context recorded: the disputed 1983 elections, pervasive corruption allegations against the ruling National Party of Nigeria, and the oil-glut economic crisis are noted as documented drivers. Arc forward: Buhari was himself overthrown by Ibrahim Babangida in August 1985, and returned decades later as elected president in 2015, later context.
Cross-Reference
Datasets agree. At least two of the three reference datasets we check against carry this event, and none of them disagrees about its date or its result.
Identifiers for finding this same event in the other datasets:
Coup Atlas research identifies the target as: President Shehu Shagari, overthrown on December 31, 1983 by the military under Buhari; he was detained and placed under house arrest..
Baseline coding: Incumbent executive removed from power. Recorded leader fate: deposed; arrested or jailed. The baseline file does not name individual targets; researched names are kept in a separate layer.
Baseline Dataset Citation
Cline Center Coup d’État Project Dataset, v2.2.2
Peyton, Buddy, Joseph Bajjalieh, Michael Martin, and Andrea Gerald. 2026. Cline Center Coup d’État Project Dataset. Cline Center for Advanced Social Research. V.2.2.2. February 17. University of Illinois Urbana-Champaign. doi: 10.13012/B2IDB-9651987_V10
“Nigerian Army says its has Forced out the Civil Regime,” by Clifford May, January 1, 1984
“NIGERIAN MILITARY REGIME IS REINING IN ONE OF THE FREE ST PRESSES IN AFRICA,” April 30, 1984
“Army officers Said to Overthrow Nigeria’s Ruling Military Council,” August 28, 1985
This is the citation trail carried by the baseline dataset, grouped by outlet and rejoined from the line-wrapped original. Coup Atlas has not independently re-checked every document; read the original before citing a specific claim. URLs the import damaged beyond safe repair are shown as plain text and listed in citations-report.md. How this list is built →