Colonization of Verath
Characters who use the Martial power source have skills at fighting honed through long practice. Though they don’t have access to any supernatural abilities, they make up for it with strength, speed, and skill.
The bulk of most armies is formed of soldiers using the Martial power source, as anyone can wield a weapon, given time and practice. Also, martial weapons are cheap and easy to produce and maintain. This makes the logistics of the army much simpler.