A hybrid of sci-fi epic and military thriller. It centers around a squad of Marines fighting against a tyrannical enemy. It is not that shallow. They also fight against enemies within (leftists) and there is even some cloack-and-dagger stuff as a result. Not only that there is some alien technology dicovered on a dangerous backwater planet called Sheol. Technology that is not necessarily a superweapon but would give whoever wields it absolute power.
Need to go now. Nighty night.