Where science, blood, and will rules the battlefield

Halo, the battle between Humans and Covenants. The Covenants are stubborn bastards, killing, blasting, and glassing planets and their inhabitants, which are mostly Humans.

There's many positions for the United Nations Space Command, or the UNSC for short. The Orbital Drop Shock Troops --ODST for short-- is a special division of the UNSC marines, who isn't the biggest fan of the Spartans, nor do they despise them, but they work with each other on some missions.

UNSC Navy, who pilots spaceships of all sizes and purposes which are mostly combat based for fighting the Covenants ships. They are essentially the backbone to fighting the Covenants, and transporting Spartans and marines.