Theirs Not to Reason Why, book 2 : An Officer's DutyJean Johnson2012

Promoted in the field for courage and leadership under fire, Ia is now poised to become an officer in the Space Force Navy—once she undertakes her Academy training. But on a trip back home to Sanctuary, she finds the heavyworld colony being torn apart by religious conflict. Now Ia must prepare her family and followers to secure the galaxy’s survival. Her plan is to command a Blockade Patrol ship. Her goal, to save as many lives as she can. But at the Academy, she discovers an unexpected challenge: the one man who could disrupt those plans. The man whose future she cannot foresee...