The Nigerian/ Biafra civil war ended on

Analyze the question: The question asks for the date the Nigerian Civil War (Nigeria-Biafra War) ended. This is a factual history question, so we need to recall the key dates.

Key dates to know:

• 15 January 1966: First military coup (Major Nzeogwu and others). The option A date, "January 15, 1967", is a distractor because the coup happened in 1966.
• 27 May 1967: Gowon announced the division of Nigeria into 12 states. Ojukwu declared Biafra's secession on 30 May 1967.
• 6 July 1967: The war began.
• 12 January 1970: Biafran forces, led by Philip Effiong, surrendered.
• 15 January 1970: Gowon formally accepted the surrender and the war ended. Gowon declared "No victor, no vanquished."
• 29 July 1975: Gowon was overthrown (not 13 July). 13 February 1976 was when Murtala Muhammed was assassinated.

Step-by-step solution:

1. The war lasted about 30 months (July 1967 to January 1970), so the end date must fall in 1970.
2. That leaves options C (15 January 1970) and D (27 May 1970).
3. The surrender took place in January 1970, with the formal end on 15 January 1970. Nothing ended the war in May 1970, so D is wrong.

Answer: C. 15 January 1970

Tip: Remember the war as "67 to 70": it began in 1967 and ended in January 1970. Also watch for date distractors, because options A and B use the dates of the 1966 coup and the 1967 state creation, which are events from the build-up to the war and not its end.