Valor's Choice (Valor Novel) - Tanya Huff Read in the 2 for 1 Confederation of Valor.

Torin has just finished with one battle when she and the remains of her platoon are thrown into another a diplomatic mission that is supposed to see no combat. The new lieutenant also happens to be a man she met and slept with the night before. That actually has nothing to do with the story. The platoon has to survive them being blown out of the sky and attacked by a bunch of young Silsviss. Very good story. Had me biting my nails with each turn of the page.