U.S. Agent

U.S. Agent (real name John F. Walker), also seen as USAgent is a fictional character and comic book superhero appearing in books published by Marvel Comics, usually those starring the war hero Captain America and the Avengers.

He was later redesigned as a new incarnation of Captain America after Rogers retired himself from the mantle and, just a few years later, as U.S. Agent when Rogers returned. Walker originally served as an antagonist towards Captain America, with him being considered a dark shadow of Rogers' patriotic and pacifist qualities. He would redeem himself and become the "U.S. Agent", protecting America's interest while becoming a member of numerous teams.

The character was created by Mark Gruenwald and the late Paul Neary and first appeared in Captain America #323 (November 1986) as Super-Patriot.

In the Marvel Cinematic Universe, the character is portrayed by Wyatt Russell in the Disney+ television series, The Falcon and the Winter Soldier (2021) and will reprise the role in the upcoming movie Thunderbolts* (2025).