●It protected the right of a freed slave to file a lawsuit.
The United States declared war against Spain. It would be the first overseas conflict fought by the U.S. It involved major campaigns in both Cuba and the Philippine Islands.
The reasons for war were many, but there were two immediate ones: America's support the ongoing struggle by Cubans and Filipinos against Spanish rule, and the mysterious explosion of the battleship U.S.S. Maine in Havana Harbor.
Biafra was the African state that claimed independence in May 1967, capitulated to the Nigerian government.
Hopefully this helped and good luck.