Shadow Detachment - Shadow Detachment, #1

In 1950, war rages on the Korean peninsula as Communist forces battle the defenders of freedom on land and in the air. Lieutenant Mark Kenslir is plucked from a position translating Russian radio broadcasts and attached to a mysterious unit of rag tag misfits: Detachment 1039. Parachuting behind enemy lines to investigate the fate of a field hospital that had been treating a captured MiG pilot, Kenslir soon learns that his brothers in arms are not entirely what they seem to be.
When it becomes clear that more than Soviets and Chinese troops are helping the North Koreans, the small detachment is forced to change their mission and go on the hunt for something not entirely human.