Chimamanda Ngozi Adichie, 2006. Three lives during the Biafran war. Orange Prize.
From Wikipedia
Half of a Yellow Sun is a 2006 novel by Nigerian writer Chimamanda Ngozi Adichie. Set in Nigeria in the 1960s, the story follows Ugwu, a teenage houseboy who has moved from his village to work in a university town; his master Odenigbo, a mathematics professor with revolutionary views; and Olanna, the beautiful daughter of a wealthy Nigerian man, with whom Odenigbo is in love. When the Nigerian Civil War (1967–1970) breaks out, their lives are thrown into chaos.