Captain Vulcan was a villain in The Rat Patrol.
Vulcan was a Kriegsmarine officer in command of a secret naval base on the Mediterranean Coast in Africa. Moffitt, disguised as a French electrician, infiltrated the base hoping to gain information about a Kriegsmarine convoy carrying a shipment of Tiger tanks to Africa.
Vulcan became suspicious when the power went out, then abruptly came out - it turned out Moffitt had cut the power to bypass the alarm on Vulcan's safe. Moffitt was quickly apprehended, and Vulcan had him tortured by Lieutenant Reiner and Seaman Urban. When Moffitt faked his death after being wounded by Reiner, Vulcan thought he died, and refused to believe Reiner's warnings that the death was staged. He ended up getting shot and killed by Moffitt.