A Princess Warrior

In 3049 soldiers were taken from their homes to fight in world war 4. For 17 year old Felicity Cooper, life is pretty good. She has good grades, fabulous friends, and a rich family. But when her dad, who is getting very weak, is chosen to fight in the war, Felicity can't let that happen. She knows that if her father goes to fight them he will surely die and never return. Felicity decides to take on the brave journey ahead of her and fight for her dad in the army. The problem is that she is a girl and they won't let girls fight because people believe them to be weak. Felicity however doesn't accept that. So when the day comes she pretends to be a boy.
Soon Felicity's world is swept up in hard training, many wounds, to make sure henry- a close ally she makes- is safe, and a prince, who is the leader, that doesn't take his eyes off her. Will anyone find out about her secret? Will she survive this horrible era and make it back to her home? And if she does will anything be the same again?