MarsGuard Cowpens Class Destroyer Escort Class History The Cowpens class was built off the Belt Alliance's Heavy Escort hull. The forward blast cannon was replaced by a railgun, while the interceptors were replaced with dual unipulse cannon turrets. These ships usuall accompany the Blackhawk class destroyers whenever they leave orbit. Their hangar was enlarged to berth an Enforcer in addition to the shuttles already carried. Nine of these ships were built. Cowpens Class SCS