I agree with Phenkat that not many outside of Ethiopia were aware of these women soldiers. Many fought side by side and died fighting for a country they loved and a people they believed in. The author's great great grandmother was one of those women and in telling her story to the world, the author fulfils a duty the living owe to the dead -- male and female -- by keeping their stories alive lest others forget their sacrifice.
The novel speaks of another resurrection, one that involves coming back from the brink of grief and pain and loss so immense that one stumbles as if dead among the living. There are so many parts in the book where the women were crushed by the violence wrought on them by their kin and their enemy that should have spelled the end of them, yet the author chose to portray the resilience of the human body and spirit to rise from the depths of despair and to break the shackles (real and phantom) and to move forward.
I also found the Shadow King's appearance its own kind of resurrection. A man whose name means 'nothing' mobilised an entire nation when all hope was gone and there was literally 'nothing' going for the Ethiopians including an Emperor who had seemingly abandoned them. And yet from 'nothing' came everything else that was to follow.