Absolution (1997)

Decades after a meteorite destroys much of life on Earth, young survivor Ryan Murphy travels to a military base as a new recruit. However, Murphy is really an agent investigating strange occurrences at the base, which is ruled by the unforgiving Sgt. Bradley. As Murphy trains with his fellow recruits and secretly looks into the disappearance of a friend, he uncovers a shocking secret that may change the fate of humankind.