Gideon Mace is a Marvel Comics character that appears primarily as an enemy of Luke Cage. He has also had a few encounters with Spider-Man.
In 1968, during the Tet Offensive of the Vietnam conflict, Mace led his troops in an unauthorized assault on a village. One of his soldiers, Jaime, stepped on a landmine, and was killed. Mace was nearby, and his right hand was destroyed by the explosion. Mace was discharged from the army for his actions, his discharge papers citing insubordination, mental incompetence, and suspicion of combat activity independent of orders. He was outraged at what he felt was unjust treatment. He had his hand fitted for a prosthetic, a mace, after his own name, and began to recruit soldiers into his own personal army, to gain revenge on the nation that had mistreated him.