Biafra, officially the Republic of Biafra, was a partially recognised state in West Africa that declared independence from Nigeria and existed from 1967 until 1970. Its territory consisted of the former Eastern Region of Nigeria, predominantly inhabited by the Igbo ethnic group. Biafra was established on 30 May 1967 by Igbo military officer and Eastern Region governor C. Odumegwu Ojukwu under his presidency, following a series of ethnic tensions and military coups after Nigerian independence in 1960 that culminated in the 1966 anti-Igbo pogrom. The Nigerian military proceeded in an attempt to reclaim the territory of Biafra, resulting in the start of the Nigerian Civil War. Biafra was formally recognised by Gabon, Haiti, Ivory Coast, Tanzania, and Zambia while receiving de facto recognition and covert military support from France, Portugal, Israel, South Africa and Rhodesia. After nearly three years of war, during which around two million Biafran civilians died, President Ojukwu fled into exile in Ivory Coast as the Nigerian military approached the capital of Biafra. Philip Effiong became the second president of Biafra, and he oversaw the surrender of Biafran forces to Nigeria.

Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea to the south in the Atlantic Ocean. It covers an area of 923,769 square kilometres (356,669 sq mi), and with a population of over 230 million, it is the most populous country in Africa, and the world's sixth-most populous country. Nigeria borders Niger in the north, Chad in the northeast, Cameroon in the east, and Benin in the west. Nigeria is a federal republic comprising 36 states and the Federal Capital Territory, where the capital, Abuja, is located. The largest city in Nigeria is Lagos, one of the largest metropolitan areas in the world and the largest in Africa.