The Civil Warrior Armor was built by Steve Rogers following the death of his friend and rival Tony Stark in their final battle during the Civil War that engulfed the planet. It combined Steve's own equipment with parts of prototype armor collected from Tony's destroyed lab, and was used both as battle enhancements and as homage to his fallen friend. Later, it was upgraded by an alternate Tony Stark for the incoming battle against Carnage and Punisher 2099.