This article or section contains information about StarCraft: Ghost, which has been declared non-canon. Elements may be taken as 'flavor lore' however.
Four years after the Brood War, Buck led marines to retake Vespene Refinery BF 1138 from the zerg. The captain failed to conduct reconnaissance prior to advancing and severely underestimated zerg strength. The marines under Buck soon found themselves on the verge of being overrun by a zerg counter-attack.
Buck is mentioned in an early build of StarCraft: Ghost prior to the cinematic release. Several marines mention how he mishandled the Mar Sara operation, and how his "head will roll" if he survives.