Steven Rogers (Earth-111)

In all of history, only two men have recieved the super-soldier formula. Captain America

Steven Rogers, the First Captain America was placed in stasis at the end of world war II and released in modern times to combat major threats to america. He was also bonded to a symbiote as a government expirament. The symbiote could not control him due to his will, so he has joined Toxin's resistance. Cap's weapon is a circular shield with extremely sharp edges, made from a hybrid metal that cannot be scratched or dented.

USAgent
A government agent named John Walker was the second man to recieve the super soldier formula. Walker was originally to become the New Captain America, but after Rogers was released from stasis, John wanted his own superhuman Identity. Taking the name "USAgent" Walker also joined Toxin's resistance. USAgent's weapon is a circular sharp edged sheild like Captain America's, but it is made of pure Vibranium and emits sound waves when struck.