Define biafra war please

The Nigerian Civil War (Biafra) was a civil war in Nigeria fought between the government of Nigeria and the secessionist state of Biafra from 6 July 1967 to 15 January 1970

Explanation:

Immediate causes of the war in 1966 included ethnology-religious riots in Northern Nigeria, a military coup, a counter-coup and persecution of Ibo living in Northern Nigeria.

Explanation:

franklin d. roosevelt

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answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;