Well, then that is due to the ignorance of your generation because the Biafra war was never any secret. It was widely publicized, being the first major African civil wars in modern history and the one of the first televised wars in the world in general. What's more, Ojukwu used propaganda as a key weapon in the war, so a lot of work was done to "advertise" the war, with the images of starving children broadcast across the world. Many Western celebrities (most notable being John Lennon and Yoko Ono) staged very public protests against the war. It was on the covers of all the magazines and newspapers throughout Europe and the USA and it was on TV every single night. If you or others of your generation don't know that there was a civil war in Nigeria it's certainly not because it was never given any coverage.