 In "Steel Gauntlet", St. Cyr, a maniacal sadist who has reinvented the doctrine of armored warfare has taken control of the planet Diamunde, and 34th FIST is deployed as part of a larger force in a full-scale war to remove him from power.The Marines are to make an opposed landing, establish a "planethead" and hold for relief by the army.These Marines are going to have to fight tanks, something nobody has trained to do in several centuries.