Beyond the Great Houses of the Inner Sphere lies the untamed Periphery. Filled with young souls seeking adventure and freedom, the Periphery is a watershed for every stripe of humanity. Wild,uncivilized, and deadly, the Periphery is a turbulent frontier where any warrior who dares can be king! This BattleTech sourcebook describes the various factions that make up the Periphery, describing their history, military doctrine, traditions, and tactics, plus special rules, weapons, and BattleMechs that reflect the exclusive capabilities of each regiment.