The first Nigerian Head of State to be overthrown by a coup was:

Answer Details

The first military coup in Nigeria occurred on 15 January 1966. This coup, led by a group of young military officers (the "Five Majors"), overthrew the civilian government of the First Republic. Prime Minister Sir Abubakar Tafawa Balewa, the head of the federal government, was abducted and killed during the coup.

In Nigeria's First Republic (1960-1966), executive power rested with the Prime Minister, while the President (Nnamdi Azikiwe) held a largely ceremonial role as Head of State. Although Azikiwe was technically the Head of State, it was Tafawa Balewa who exercised real governing authority as Head of Government. The January 1966 coup effectively ended civilian rule and removed Balewa from power - making him the first Nigerian leader to be overthrown by a military coup.

Nnamdi Azikiwe was abroad at the time of the coup and was not directly overthrown. Aguiyi Ironsi assumed power as Head of State after the coup but was himself overthrown later in the July 1966 counter-coup. Yakubu Gowon succeeded Ironsi and was later overthrown in 1975. The question tests knowledge of who was the first leader removed from power by a coup, and that distinction belongs to Tafawa Balewa.