David Drake's Hammer's Slammers: Slammers Down!

From the Back of the Book: You are Lt. Bromley of the intergalactic mercenary force of Hammer's Slammers. A transport has crashed. Men are hurt and the wreckage is scattered. Ammo and medical supplies are low and the crash site is not secured. The men are in deep trouble unless someone acts - fast! Colonel Alois Hammer has chosen you to command a rescue mission. But the remaining troops are ill-equipped, undermanned, and inexperienced. And what's more, you can't trust your back-up. What will you do? Will you go it alone? Refuse the mission altogether? Or make the best of it and lead Hammer's Slammers into savage combat?