I've mentioned the Minutemen a few times, but never really explained them. They originally began as a paramilitary gendarmerie force in the lead up to the Third World War. Over time, they became used primarily for security on the frontier, morphing into the de facto U.S. armed forces in the Outer System. The Coast Guard was folded into them in the 2080s (while the Coast Guard remains a coast guard in the Inner System, in the outer system, it's become a Navy). The Minutemen use mostly lighter, less advanced equipment. While the U.S. Army is equipped with the latest powered armor, railguns, combat mechs and heavy tanks, the Minutemen are largely equipped with nothing more than camoflague fatigues, future!Kevlar vests, assault rifles and IFVs (however they do have some heavier, more advanced units). Their Air Service is largely fighter-bombers, close-air support attack planes, strategic bombers, helicopters and transports. The Minutemen are nuclear armed, though most of it is concentrated on Ganymede as a deterence to Deskarva and Rhea as a weapon against the jotunns. The Minutemen have become extremely powerful in the outer system, though they've often been accused of war crimes (particularly during the Ionian mutiny).