The USA reigns over Earth as the last surviving superpower. To build a society free of American influence, foreign countries have inhabited the moon. Under orders from the US military, Sergeant Ethan Stark and his squadron must train to fight a desperate enemy in an airless atmosphere.

The USA reigns over Earth as the last surviving superpower. To build a society free of American influence, foreign countries have inhabited the moon. Under orders from the US military, Sergeant Ethan Stark and his squadron must train to fight a desperate enemy in an airless atmosphere.