In 1967 the Eastern Region of Nigeria, dominated by the Igbo ethnic group, declared independence as the Republic of Biafra following a series of coups and anti-Igbo pogroms in northern Nigeria. The Nigerian federal government responded with a military campaign that included a blockade of Biafran territory, producing mass starvation that became a defining international humanitarian crisis of the era, with widely publicized images of famine driving global relief efforts. Biafra surrendered in January 1970; estimates of total deaths range from roughly one million to three million, the large majority from starvation and disease rather than direct combat, and millions of civilians were displaced within Biafran territory during the war. The war remains a foundational and contested episode in Nigerian history, with debates over whether the federal blockade constituted a deliberate policy of starvation.
The Nigerian federal government fought the secessionist, Igbo-led Republic of Biafra; a federal blockade caused mass famine among Biafran civilians
The 1963 census, whose figures were politically contested across all regions, gave the Eastern Region about 12.4 million people; Biafra claimed roughly 14 million at secession, including Igbo who had fled back east after the 1966 pogroms in the north. Famine deaths under the federal blockade are usually estimated at one to two million, with contemporary relief agencies reporting several million people dependent on airlifted food at the height of the crisis.
Britannica gives a range of 500,000 to 3,000,000, and the overwhelming majority of deaths were from starvation and disease under the federal blockade rather than combat. Biafran authorities and the relief agencies that airlifted food favoured the higher figures — contemporaneous relief estimates ran to 2-3 million, and Nigeria's federal government and some later historians favoured the lower end and have publicly disputed the claims of five million that circulate in secessionist commemoration.
The ICRC, Joint Church Aid and the relief agencies that ran the Uli airlift documented mass starvation under the federal blockade, and historical research on the Asaba massacre of October 1967 documented the mass killing of Igbo civilian men by federal troops.
Nigeria