Real Name: John F. Walker
Occupation: Former soldier, now adventurer and government operative
Identity: (as Captain America VI) Publicly known, (as U.S. Agent) Secret
Legal Status: Citizen of the United States with no criminal record
Other Aliases: Super-Patriot, Captain America VI
Place of Birth: Custer's Grove, Georgia
Marital Status: Single
Known Relatives: Caleb (father, deceased), Emily (mother, deceased), Mike (brother, deceased), Kate Tollifson (sister)
Group Affiliation: (former)Operative for the U.S. government's Commission on Superhuman Activities, member of the West Coast Avengers and Force Works, former partner of Battlestar, (current) Leader of the Jury
Base of Operations: Washington, D.C., also Avengers Compound, Malibu, California
First Appearance: (as Super-Patriot) CAPTAIN AMERICA #323, (as Captain America) CAPTAIN AMERICA #333, (as U.S. Agent) WEST COASTAVENGERS.

History: The son of Caleb and Emily Walker, John F. Walker was born and raised in Custer's Grove, Georgia. His older brother, Mike was a soldier and helicopter pilot in the Vietnam War, in which he died. Wanting to live up to his brother's memory, John Walker enlisted in the military himself, but America's involvement in the war had ended, and Walker's hopes of becoming a hero while in the service went unfulfilled.

After leaving the military, Walker was told by a friend about the Power Broker, a mysterious individual who claimed he could endow people with superhuman strength. Walker and his friend signed up with the Broker for his treatment and gained superhuman strength.

Walker now had to find a way to earn money to pay the Power Broker for the treatment and was planning to try out for the Unlimited Class Wrestling Foundation. But then Walker met a man named Ethan Thurm, who became his manager. Thurm urged Walker to pursue his goal of becoming a hero rather than wrestling. Thus, Walker became the costumed Super-Patriot, a self-proclaimed hero who claimed to stand for American ideals. Thurm helped Walker design the Super-Patriot costume, found him financial backers, and devised a public relations strategy to make him a hero in the public's mind. As the Super-Patriot, Walker toured the nation, held patriotic rallies, and participated in community service projects.

At a rally in New York City's Central Park, the Super-Patriot publicly criticized Captain America, the hero who was generally held to embody American ideals, as being out of touch with contemporary America. During the rally the Super-Patriot was attacked by men calling themselves the Buckies (the Bold Urban Commandos) who wore variations on Captain America's costume and claimed to be supporters of Captain America. The Super-Patriot easily defeated his assailants and then demanded that Americans choose whether he or Captain America should be the nation's living symbol. In fact, the Buckies were wrestlers who were working with the Super-Patriot, end their attack was staged as a public relations ploy.

Soon afterward, Captain America confronted Walker, who challenged him to a "contest of might" to determine who would remain active as a hero. Captain America declined the challenge, but warned the Super-Patriot he would bring him to justice if he found him engaged in illegal activities. Shortly afterward the Buckies attacked Captain America, who fought them off.

Later, Captain America confronted the Super-Patriot again, accusing him of being behind the Buckies' attacks on and intimidation attempts against foreigners, which the Super-Patriot had intended as an "antiterrorist campaign." The Super-Patriot then attacked Captain America, who briefly fought him.

Shortly afterward, to gain good publicity, the Super-Patriot captured a terrorist named Warhead who had threatened to detonate a nuclear device in Washington, D.C.

The federal Commission for Superhuman Activities had demanded that Captain America stop acting as a free agent and begin working directly under government supervision, inasmuch as the identity, costume, and shield of Captain America had all been originally created by the federal government. Steve Rogers, the original Captain America, declined, and gave up the Captain America identity.

Dr. Valerie Cooper, a member of the Commission, suggested that the Super-Patriot become the next Captain America. She met with the Super-Patriot, who revealed his true identity to her and accepted her offer. Thus, John Walker became the sixth man to take on the role of Captain America.

In reality, the Commission's chairman, Douglas Rockwell, was secretly an operative of the original Captain America's archenemy the Red Skull. The Skull's intention had been to force Steve Rogers into giving up the role of Captain America and then making certain that his replacement dishonored, the image of Captain America that Rogers had maintained over the years.

The Commission did not approve of Walker's association with Thurm or two of the three Buckies and forced him to drop them as associates. However, the Commission approved of one of the Buckies, Lemar Hoskins, who became the new Captain America's partner using the name and Costume of Bucky (The original Bucky was the first Captain America's partner in the 1940's). Later Hoskins took on the new identity of Battlestar.

Walker and Hoskins underwent a rigorous program of training under Cooper's auspices. One of Walker's instructors was the Taskmaster, who has learned to duplicate the original Captain America's fighting style. They then began going on missions for the government under the direction of another Commission member, Adrian Sammish. For example, they were sent into combat against the criminal forces of the late Professor Power.

Walker considerably moderated his extreme political views in his new role of Captain America in an attempt to live up to the image and ideals of the original.

As for Steve Roger's himself, he eventually adopted a new costumed identity, calling himself simply "the Captain."

During the public ceremony that announced the appointment of a new Captain America, Walker's former associates, two "Buckies" now calling themselves the Left-Winger and Right-Winger, publicly revealed the new Captain America's true identity.

As a result, the right-wing vigilantes called the Watchdogs, who sought vengeance on the new Captain America, murdered Walker's parents. Driven temporarily insane with rage, Walker brutally killed many of the Watchdogs in retaliation. Holding the Left-Winger and Right-Winger responsible for his parents' deaths, Walker captured his two former comrades and left them to die in an explosion. The Left-Winger and Right-Winger survived only due to the affects of the strength enhancement treatment they had undergone, but were left terribly burned and in critical condition. The members of the Commission were disturbed by Walker's increasing ruthlessness and seeming lack of control.

The Red Skull's consciousness now inhabited a body cloned from that of Steve Rogers. The Skull lured Walker to his headquarters in Washington, D.C., confronted him, claiming to be Rogers, and to be behind Walker's recent tribulations. The Skull then had Walker attacked by various of his operatives, representing Walker's most recent adversaries, including a Resistant, a Watchdog, and a man dressed as Scourge. The Skull then arranged for the enraged Walker to confront Steve Rogers, who had also arrived at the Skull's headquarters investigating the Skull's murder of Rockwell. Thinking that Rogers was out to kill him, Walker attacked the Captain, but after a furious battle, Rogers succeeded in defeating Walker. The Skull then entered and confronted the Captain, revealing his true identity and his plans. Walker revived as the Skull continued his discussion with Rogers. Just as Rogers realized that the Skull was attempting to kill him with his "dust of death" contained in his cigarette smoke, Walker hurled his shield at the Skull, striking him down. The Skull thus inhaled his own gas, causing his head to take on the appearance of a blood-red skull. The Skull fled.

Rogers and Walker made their reports on what had happened to the Commission. The Commission offered Rogers the post of Captain America again. Rogers, however, declined, until Walker himself asked him to reconsider. Walker knew that the Commission would fire him from the role of Capitan America whether or not Rogers accepted.

Rogers thus returned to the role of Captain America. However, at the press conference announcing the return of the original Captain America, Walker was seemingly killed by a man wearing a uniform resembling that of the Watchdogs. The apparently assassin was then slain by a vigilante in the guise of Scourge.

In fact, Walker was still alive. The seeming assassination had been arranged by General Haywerth, a member of the Commission. (However, Haywerth had nothing to do with Scourges murder of the "assassin.") Believing that Walker's more brutal activities as Captain America had permanently discredited, him in the public eye, Haywerth intended to allow the public to believe Walker had died as a hero, and then create a new identity for him. Haywerth established a new cover identity for Walker and had him undergo speech therapy and training to replace his old mannerisms with new ones. Walker took on the new costumed identity of the U.S. Agent, in which he wears a costume identical to the one Rogers wore as the Captain. The general public is unaware that the U.S. Agent is actually John Walker. As the U.S. Agent, Walker continues to operate on missions for the Commission. On the insistence of the Commission, the U.S. Agent became a member of the Avengers and is based at their West Coast compound.

After several battles alongside the Avengers, U.S. Agent left them due to personality conflicts and reckless behavior, only to prove himself to them later and was able to rejoin (completely divorcing himself from the Commission.) He served until the disbanding of the West Coast branch and was brought by Tony Stark into the team Force Works, serving until that team folded as well. He teamed up breifly with his former teammates as they reformed the Avengers after an hiatus.

U.S. Agent was later hired by Edwin Cord, owner of Cord Industries, who, for reasons of his own, wanted to fund a superhero team to take down the supposed still-criminal Thunderbolts. U.S. Agent led the team, called The Jury, against the Thunderbolts and their new leader, Hawkeye, but were beaten back and the Thunderbolts escaped. On a second attempt to apprehend them, U.S. Agent and the Jury ended up joining their adversaries against Brute Force and the soldiers of the Secret Empire.

Height: 6 ft. 4 in.
Weight: 270 lbs.
Eyes: Blue
Hair: Blond

Strength Level: Due to treatment by the Power Broker, the U.S. Agent possesses superhuman strength enabling him to lift (press) roughly ten tons.

Known Superhuman Powers: The U.S. Agent's only superhuman powers are the superhuman strength and stamina given him by the Power Broker's treatment.

Other Abilities: The U.S. Agent has received rigorous training in hand-to-hand combat, acrobatics, and gymnastics. He has been trained by the Taskmaster in the original Captain America's own fighting style, which employs boxing, judo, and acrobatics.

Weapons and Paraphernalia: As the Super-Patriot Walker wore a costume made of bulletproof Kevlar and carried a "torchsword," a weapon which projected flame

As Captain America Walker wore a costume consisting in part of chain mail and carried the first Captain America's shield.

As the U.S. Agent Walker also wears a costume made of chain mail and carries a shield made of Vibranium, which can absorb the vibrations from concussive forces directed against it.