In the future the Earth lives under a military run government.
Schools are set up to churn out soldiers and thoses loyal to the governments causes.
Training is brutal, surrender is never an option. A great alien attack on the Earth has been going on for many years now. The Mobile Infantry is finally dispatched to the home world of the bugs in an attempt to eradicate them. They are landed with no ground vehicles, no artillery, and no heavy weaponry. This is very illogical from a military point of view.