10. Yakubu Gowon
Number of Deaths: 1.1 million
From 1966 to 1975, Yakubu Gowon was the head of state in Nigeria. It was in his regime that oil of massive amounts were discovered in the Niger delta which was lead by an Eastern region leader, Ojukwu. Ojukwu tried to declare to secede from Nigeria but Yakubu resisted this and prevented the secession of the Biafran.