Showing Kitty Goes to War by Carrie Vaughn

Three soldiers recently returned from the war in Afghanistan are in custody at Ft Carson in Colorado Springs. They're werewolves, suffering from post traumatic stress, which has left them unable to control their shapeshifting, unable to interact with people. Kitty agrees to see them; after her own battles in KITTY'S HOUSE OF HORRORS (Kitty #7), she feels a great deal of sympathy for them.

The soldiers were part of a unit fighting Taliban insurgents in the remote mountains of Afghanistan. Their captain, the original werewolf, transformed the others; their new-found strengths including the ability to survive untold violence while infiltrating remote enemy positions, made them the perfect soldiers for this mission. But it was the captain who kept the group together and kept them sane; when a particularly potent mortar attack killed the captain, the remaining lycanthrope soldiers grew more and more wild, until the final three survivors were captured and delivered to Dr Shumacher at the Center for the Study of Paranatural Biology for treatment.

Kitty tries to bring the men into her own pack, to socialise them back into some kind of normal existence, but the group's sergeant has other plans: he's intent on driving out Kitty and Ben and becoming the leader of a new squad of killers.