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The Nigerian Civil War: Why and How It Happened (1967-1970)

Nigerian troops entering Port Harcourt, after routing Biafran troops during the Biafran War.
Nigerian troops entering Port Harcourt, after routing Biafran troops during the Biafran War. (Photo by Evening Standard/Getty Images)

The Nigerian Civil War, also known as the Biafran War or the Nigerian-Biafran War, broke out between the Federal Republic of Nigeria and the secessionist state of Biafra from July 6 1967 to January 15 1970. Nigeria’s main reason for going to war was to counter the secession of the Eastern Region (Biafra) from the Republic of Nigeria.

The Igbo people of the Eastern Region felt they could no longer tolerate the Hausa-Fulani-dominated federal government and saw secession as the only way out. It was a three-year bloody war with a death toll numbering more than one million people, children included.

Immediate Causes of the Nigerian Civil War

1. The first military coup of Jan. 15 1966, led by Major Kaduna Nzeogwu, was seen as an Igbo coup by the Northerners. Prominent Northern leaders like Prime Minister Abubakar Tafawa Balewa, Alhaji Ahmadu Bello (Premier of the Nothern Region) and his wife, Hafsatu Bello, were killed in the coup while some Igbo leaders were spared. After the coup, General Johnson Aguiyi-Ironsi, an Igbo officer, was installed as the Head of State. This angered Northerners who sensed foul play. They prepared for retaliation.

Troops from the Nigerian Federal Army marching along a road after routing Biafran troops at Port Harcourt during the Biafran War.
Troops from the Nigerian Federal Army marching along a road after routing Biafran troops at Port Harcourt during the Biafran War. (Photo by Express Newspapers/Getty Images)

2. The 1966 counter-coup. This was the second coup in Nigeria. On July 29 1966, some Northern military officers led by Lt. Colonel Murtala Muhammed staged a coup which was a retaliation to the killings of Northern politicians and officers by January 15, 1966 coup plotters. This coup brought General Yakubu Gowon, a Northerner to power. The North successfully reclaimed power.

3. The third immediate cause of the Nigerian civil war was the massacre of Igbos living in the northern part of Nigeria. After the first and second coup which was seen as ethnic strife, tension began to rise amongst Igbos in Northern Nigeria. This tension culminated in the pogroms targeted at Igbos. Between June and October 1966, pogroms in the North killed an estimated 8,000 to 30,000 Igbos, half of them children, and caused more than a million to flee to the Eastern Region.

4. In May 1967, to strengthen the unity of the country, the Federal Military Government of Yakubu Gowon divided Nigeria’s four regions into twelve states. The former Eastern region under Lt. Col. Chukwuemeka Ojukwu saw the state creation (without consultation) as the last straw. And so, on the 30th of May, 1967, Lt. Col. Ojukwu declared the existence and independence of the Biafra Republic.

The outbreak of the Nigerian Civil War

The Federal Military Government condemned Ojukwu’s action and ordered that the secession of the Eastern Region as Biafra should be countered. On the 6th of July, 1976, the Nigerian federal troops marched in two divisions into Biafra. Division 1, led by Col. Shuwa operated through the north of Biafra, while the second Division advanced on Nsukka which was captured on July 14 1966.

Nigerian civil war
JULY: Colonel Emeka Ojukwu, the Biafran secession leader in front of a map during the Biafra war in Nigeria in July 1968. (Photo by Fondation Gilles CARON/Gamma-Rapho via Getty Images)

On the 9th of July, the Biafran army retaliated by attacking the mid-western region of Nigeria. They marched across the Niger River, passed through Benin city and later stopped at Ore on August 21. This attack was led by Lt. Col. Banjo, a Yoruba, with the Biafran rank of brigadier. The Biafran troops captured the mid-west after a little resistance from soldiers stationed in the region.

This infuriated Gowon and commanded Col. Muhammad Murtala to form another division (Division 2) to drive the Biafran army out of the mid-west and attack Biafra afterwards. The mid-west region was recaptured by the Nigerian army on the 20th of September.

Enugu was made the capital of the Republic of Biafra. Later when Enugu was captured by Federal troops in October 1967, Aba, Umuahia and Owerri successively served as the provisional capitals of the Republic.

A starving Biafran family during the famine resulting from the Biafran War. (Photo by Express Newspapers
A starving Biafran family during the famine resulting from the Biafran War.

Within a year, the Federal Military Government (FMG) captured the city of Port Harcourt and many other coastal oil facilities. The Federal Military Government blocked all the routes for transporting food into the Republic of Biafra which led to the starvation and death of over 2 million Biafrans.

The FMG saw food blockade as a war strategy while many people around the world tagged it a genocide. The food flown into Biafra by foreign mercenary pilots was little and couldn’t solve the starvation Biafra faced. One of the notable mercenaries was the Swedish Carl Gustav Von Rosen who attacked Nigerian military airfields in Port Harcourt, Benin City and Enugu.

End of the Nigerian Civil War/Biafran War

The FMG attacked Biafrans through air, land and sea, leaving them helpless at some point. By the end of 1969, it was obvious that the Nigerian civil war will soon come to an end.

Ojukwu flees Biafra

The FMG launched its final operation known as “Operation Tail-Wind” on January 7, 1970. The operation was executed by the 3rd Marine Commando Division and supported by the 1st and 2nd Infantry division. Owerri was captured on the 9th of January, while Uli fell on the 11th of that same January.

The self-acclaimed head of state of Biafra, Lt. Col. Chukwuemeka Odumegwu Ojukwu, aware of the situation, fled the Republic with his family on the 8th of January, 1970. Philip Effiong, Ojukwu’s deputy who was left with the administration of Biafra later surrendered to the Federal Government on the 14th of January, 1970, therefore, bringing the Nigerian civil war to an end. Philip Effiong signed the surrender paper in Lagos and the Nigerian civil war officially ended on the 15th of January, 1970.

Soldiers celebrating the end of the Nigerian Civil war
Soldiers celebrating the end of the Nigerian Civil war

After the war, General Yakubu Gowon said, “The tragic chapter of violence is just ended. We are at the dawn of national reconciliation. Once again we have an opportunity to build a new nation. My dear compatriots, we must pay homage to the fallen, to the heroes who have made the supreme sacrifice that we may be able to build a nation, great in justice, fair trade, and industry.”

Thanks for reading,


  1. Hogan, John (20 May 2017). “How Ireland got involved in a Nigerian civil war”. Irish Times.
  2. Omipidan, T. O. (2021, April 18). Ojukwu’s Secession Speech Declaring the Republic of Biafra on May 30 1967. OldNaija.
  3. Olawoyin, Historical Analysis of Nigeria–Biafra Conflict (1971).
  4. Omaka, Arua Oko. (2016). “The Biafran Humanitarian Crisis, 1967–1970“.
  5. Omipidan, T. O. (2021, April 18). 5 Historical Riots/Wars In Nigeria That Almost Destroyed the Country. OldNaija.
Cite this article as: Teslim Omipidan. (July 26, 2020). The Nigerian Civil War: Why and How It Happened (1967-1970). OldNaija. Retrieved from


  1. Wow! Interesting. Please, I would love to hear more. Send me some stories about Nigeria in my email. Thank you. And I still do not understand what biafrans believe in.

  2. Dear Ekeoma, thanks for your comment. We’ll send you more histories as you’ve requested and you can follow us via Email subscription to receive new articles in your inbox.
    The Biafrans believed in what they believe in, I think.

  3. This article is interesting. Ojukwu is our hero! But he should have exercise patience. The war might have been a dream. Have you any article on the Aburi agreement?

    1. What was the heroic move? Running away after putting his people’s lives in danger, if you stand for something you stay with it till the end

    1. The real cause of that ugly scenario has not been addressed yet, we should stop promoting the war if we believe in one Nigeria

  4. Nice article but I believe you should have cited books and articles on the war written Nigerians. Like the Asaba Massacre it affected almost all families from the town but it is hardly ever reported in discussions about the war.

  5. ojuckwu must be an evil, he fled with his family and left helpless igbo people after causing millions of dead.
    God furnish this evil basterd….

  6. Amazing work you are doing here.
    I have read a few of your posts.
    The Anini one was interesting. So also the Biafra and Lagos history.
    I will try to read bookmark and read all or most of your posts.

  7. The article was quite informative. Great job. I have few questions. Where was the UN when the channels to bring food items to Biafrans were closed. Why did the UN allow millions of children and women to be starved to death..? Who headed the UN assembly then? Biafra soldiers should have stopped at Benin and build a formidable defence line instead of advancing to Ore with limited resources. I think dt was a strategic error.

  8. Thank you, Mr. Joe Frank.
    The United Nations took some necessary and important steps to save starving people in Bifra and also to end the war. For example, in October 1969, Ojukwu appealed for United Nations (UN) mediation for a cease-fire as a prelude to peace negotiations which was granted, but the Nigerian Federal Military Government insisted that Biafra should surrender. The Sec. Gen. of UN then was U Thant. You’re right, the Biafrans should have strengthened up their forces at Benin instead of marching to Ore with “limited resources” like you’ve said. We hope we’ve answered your questions, Mr. Joe Frank. Thank you for your visit.

  9. Hm, that was so amazing tht biafrans or rather igbos wantd to live only on their own, they were with policy to be all the way dominant of Nigerian area…..

          "living in isolation"
  10. Let me say this . It was the constitutional disagreement between chief Awos Action Group. ..and Akintolas NNDP that brought about the Western crisis of 1965 which eventually led to the coup.And counter coup and subsequently the civil war. Today we are being told that the lgbos caused the war. we have seen another AKINTOLA emerged from the West. We are watching where this unholy relationship will end. God bless Nigeria.

  11. Sorry to say these but if late col ojukwu didn’t make that move I believe by now things must have been different, at least biafia would have been a country and not a mere myth

  12. From the book ” the challenges of Biafra” it was clear that, the leader was not properly prepare for the battle, even the ”Aburi acord” did not help their situation ! Anyway, it is all history and i hope people will learn from the mistakes.

  13. Interesting to learn, this is one major thing that is lacking in our education today (HISTORY) keep it up, please am in need of {why we struck} a Nigerian history book, any bookshop you know I can get it?.


  15. Waoo! Very interesting article, i love that..but i have a question to ask, did ojukwu surrender to Nigeria at last or is it just a peaceful reconciliation?

  16. I love Nigerian old teams,may almighty God guide them and give them wisdom in Jesus name………. Amen.

  17. Our four fathers are great men in did
    they make us to become who we are now
    Nigerians please lest be one and lest live as peace and try to make it great once again.

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