3 ideas
Onyii, a cyborg child soldier with a mechanical arm, lives in a Biafran camp of war girls with Ify, a younger girl she has taken in as her sister; when Nigerian forces raid the camp, the two are separated. Onyii becomes a feared Biafran fighter, while Ify grows up in Nigeria and is educated to see Biafra as the enemy, so the war turns the sisters' bond into opposing loyalties. (Young adult novel.)
The book treats the prosthetics and implants of child soldiers as a double record: they are what the war has taken from a body, and they are what make that body more useful for further fighting. Seen this way, a technological upgrade is not a sign of progress. It shows how completely a person's body has been drafted into the conflict.
Set after climate collapse, when the wealthy have left the damaged Earth, the novel imagines the 1967–70 Biafran war returning as competition sharpens over what land and resources remain. Its argument is that historical fractures left unresolved stay dormant rather than closed, and ecological scarcity is the pressure that reopens them.