The Recruitment Station is production building in the UNATF faction which spans the length of the game. It produces everything from the early game Infantry (and through it, the Marine, Machine Gun Turret, and RPG Trooper) to the mid to late game Grenadier. Many of its units have requirements before they can be produced.
Production
As you advance in the game, more of the Recruitment Station's units become available to recruit. In total, the Recruitment Station can recruit the Infantry, Baton Soldier, Grenadier, and Shotgunner.
Obtaining
The Recruitment Station is built by the Private with no requirements.