Secret American diplomatic dispatches, spread over 21,000 pages, provide previously unknown information about the Nigerian Civil War Early in the morning of 1 July 1967, Nigeria’s young head of state, Colonel Yakubu Gowon, was feeling uneasy in his office at the Supreme Headquarters, Dodan Barracks in Lagos. The unease was a result of his being ceaselessly pressured to authorize a military invasion of the breakaway Republic of Biafra. Thirty officers had been recalled from courses abroad. Trains and truck convoys, bearing fuel, supplies and men, were still leaving Kano and…