Fledge by Penny Greenhorn
Summary: Fiona draws more attention than she would like being the only female that does hard labor on Earth’s dusty, bone-dry colony, a planet called Providence. But she’s just been plucked from her family’s farm and dropped into a military camp where no girl has ever served as a soldier before. Expected to fulfill the training required of all seventeen year old males her age, Fiona is forced to rely on her format, a group of twelve teammates. With one imposing leader, an alien, some troublemakers, and a handful of misfits for mates, can she find her place?