Watch Soldiers of the Sun (1970) : Full Movie Online Free Soldiers is set in a post-apocalyptic future where a squad of troopers is battling aliens who have taken over Mexico and, presumably other places on Earth. As they serve out their tour of duty, the soldiers catch wind of a fabled city of gold that the extra-terrestrials, known as Orcs, are occupying. So begins a battle to liberate the place and its riches.