Stonewall and his allies, Crimson Commando and Super Sabre, were all super-powered U.S. veterans of World War II.
When Storm and Wolverine eventually defeated the three, Stonewall and Crimson Commando agreed to turn themselves in to law enforcement authorities and confess their vigilantism.
[1] Stonewall, Crimson Commando, and Super Sabre (who had been presumed dead) agreed to join Freedom Force, a U.S. government sponsored team of superhumans, in exchange for a commutation of their sentences.
[5] In an attempt to lure the pro-mutant terrorist group known as The Resistants into a trap, Freedom Force staged a fake trial of an evil mutant.
For the fake trial, Stonewall acted as one of the lawyers but he was a disaster since he was inspired by the TV series L.A. Law and issued an objection without any cause.
[6] Stonewall is resurrected by means of the Transmode Virus to serve as part of Selene's army of deceased mutants.
[12] Stonewall's mutant physiology granted him tremendous superhuman strength and endurance, including incredible resistance to physical injury.
During a fight in the Necrosha event, Stonewall states he is immovable and invulnerable as long as he has solid footing on the ground.