On 15 January 1966, a faction of young army officers staged Nigeria’s first military coup, overthrowing the civilian government led by Prime Minister Abubakar Tafawa Balewa. In its aftermath, Major General Johnson Aguiyi-Ironsi suspended and modified the 1963 Constitution through the Constitution (Suspension and Modification) Decree No. 1 of 1966.
This decree placed executive, legislative, and policy powers directly under military control, sidelining parliament and regional governments. The military justified this move as necessary to restore order, curb corruption, and unify a politically fragile nation. The decree also allowed the military to issue binding laws known as decrees, which operated above all previous legislation.
Rule by Decree: How Power Was Exercised
With the constitution suspended, successive military governments ruled by decree, making immediate, binding decisions without public consultation or legislative debate. These decrees:
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- Dissolved legislatures at federal and state levels.
- Centralised governance, curtailing the autonomy of regions and states.
- Restricted political freedoms, proscribing parties and detaining opponents.
- Established the military council as the highest decision-making authority.
A key example is Decree No. 34 of 1966, the Unification Decree, which reorganised Nigeria’s federal structure, centralising power in the hands of the military government. Over time, decrees became the primary instruments for governance, controlling everything from economic policies to political structures.
The Judiciary and Limited Oversight
Despite the suspension of constitutional provisions, the judiciary continued to function, though its authority was heavily restricted. Many decrees included ouster clauses, preventing courts from questioning military laws. Some courts attempted to challenge or interpret decrees, but the military often reasserted supremacy through additional decrees.
This created a system where the military was both lawmaker and enforcer, with courts operating largely under the shadow of military authority.
Subsequent Military Rule and National Impact
Following brief civilian governance from 1979 to 1983, military rule returned and continued until 1999, under leaders including Generals Muhammadu Buhari, Ibrahim Babangida, Sani Abacha, and Abdulsalami Abubakar. During this period:
- Decrees continued to govern all aspects of life, including elections, civil service, and public expression.
- Political opposition and civil society were heavily monitored, with dissent often criminalised.
- Federal structures were adjusted for administrative efficiency, sometimes creating tension with traditional regional powers.
Military governance reshaped Nigeria’s institutions, centralising power and creating a legacy where political authority was often associated with control rather than consensus.
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Restoration of Civilian Rule
In 1999, Nigeria transitioned back to constitutional democracy with the adoption of the 1999 Constitution. Civilian authority was restored, and powers of decree were replaced by legislative processes, judicial review, and federal checks. This marked the definitive end of military dominance, though its influence on political culture and governance norms remained.
Author’s Note
Nigeria’s history of military suspension of the constitution and rule by decree shows how governance was repeatedly reshaped by the army from 1966 to 1999. Military governments suspended constitutional provisions, ruled by decree, and concentrated power, limiting democratic participation and civil liberties. Courts continued to function but with restricted authority. The eventual restoration of civilian rule in 1999 returned constitutional governance, though the period left lasting effects on political institutions, public trust, and the understanding of power in Nigeria. This history highlights the challenges of maintaining democratic institutions and the impact of concentrated authority on national development.
References
Constitution (Suspension and Modification) Decree No. 1 of 1966; legal effects on the 1963 Constitution.
Historical analysis of Decree No. 34 (Unification Decree) and subsequent military governance in Nigeria.
Lakanmi v Attorney-General (Western State) and the role of judiciary during military rule.

