The system is home to the temperate, lush planet Atlas, the arid New Madrid, and possibly other terrestrial planets still undiscovered, as well as numerous gas giants. During the Outer Rim War, the Clavius System is completely overrun by the Arm of Orion, a powerful rebel group of unknown origin. A USIF task force, spearheaded by the elite 8th Armored Infantry Division under the command of General Barrett Stone, is sent by the Empire to liberate the system from the Arm.