Stranded Behind Enemy Lines

War II based action movie that took 4 and 1/2 days to create from start to finish. It is a Part 1 to an on going series that is in the making...
Stalingrad 1943, The Americans were wiped out, with only a few surviving Germans remaining to defend their land. All 12 of the last wave of U.S. Troops were killed. Or were they? This is a World