The Terran Marine is the core infantry unit of the Terran Dominion—brutal, expendable, and utterly dependable. Encased in pressurized CMC power armor, the Marine is transformed from convict or conscript into a walking gun platform, wielding the rapid-fire C-14 Gauss Rifle with armor-piercing efficiency. Though often portrayed as cannon fodder, Marines are anything but fragile: their suits amplify strength, shield from radiation and toxins, and allow survival in deep space, underwater, or chemical warzones. With minimal augmentation and maximum discipline, Marines are fielded en masse to overwhelm alien threats through sheer volume and coordination.

The armor’s bulky silhouette—often painted blue, red, or olive drab—houses cooling systems, oxygen supply, and auto-med kits, giving each Marine a fighting chance even in the harshest environments. Training is intense, psychological conditioning is standard, and obedience is absolute. Marines are often the first in and the last out, relied upon to hold the line when more advanced units fall. Though viewed by commanders as replaceable assets, among themselves, Marines form fierce bonds—grit forged in plasma fire and alien blood. Whether battling Zerg swarms, Protoss zealots, or internal rebellion, the Marine is the Dominion's most reliable weapon: relentless, armored, and always ready to pull the trigger.