First Life - Book 1 in the Chronicles of Samantha Shepard

Raised by military parents, Shepard knew she would serve; honor & duty a part of her soul. A natural born leader, fiercely independent, she has a hard time sharing control or responsibility with anyone. As a new galactic threat emerges, she must learn how to share the burdens of war before she is buried by them. A shy Asari archeologist might just be the one to teach her...