The stalwart High-bred that comprise the North American Union inhabit a world that is far different from the America its founding fathers knew. Instead of a land that stretches from sea to sea, the NAU struggles to defend under a dozen "base-states" in what was once Ohio, Indiana, Illinois, Missouri, and Iowa. Beset from the west by the Flux Horrors and the Undead Infection to the east, the NAU is America's last line of defense against the demons of Post-Event earth.

Since the very presence of their primary foes can both disrupt and destroy advanced technology, the NAU relies on basic, overwhelming firepower. NAU forces are relatively cheap, have good physical armor, and focus on ranged damage - because going toe to toe with a slavering monstrosity with claws is foolish when you can mow them down from a distance.