Ultimate Captain America is a fictional comic book superhero appearing in books published by Marvel Comics. He is an alternate version of the mainstream Marvel continuity Captain America that appears in Marvel's Ultimate line of books. The character first appeared in The Ultimates #1 (March 2002), by writer Mark Millar and artist Bryan Hitch.
Steve Rogers grew up in Brooklyn during the Great Depression, a scrawny kid protected from neighborhood bullies by his best friend "Bucky" Barnes. Horrified by newsreel footage of the Nazis in Europe, Rogers was inspired to enlist in the Army around the time the United States entered World War II. However, because of failing the physical test, he was rejected. Refusing to work at the factories, he reattempted enlistment several times. His luck changed during another visit to Recruitment Center when Military Sergeant Dugan recruited him for Project: Rebirth after hearing Rogers pleas. After voluntarily subjecting to surgery, steroid treatments, and other experimental treatments supervised by Doctor Erskine, Rogers became the first genetically-enhanced super-soldier. During the final treatment however, he noticed a suspicious soldier focusing on him instead of standing guard. The shady man revealed himself as a Nazi spy sent to murder Rogers in the event he survive the entire experiment. Nearly sabotaging the entire experiment, Rogers stopped him, but not before the spy murdered Doctor Eskine and a few American soldiers who attempted to stop him. Fully committing himself to the American war efforts, Rogers bid farewell to his sweetheart Gail becoming "Captain America".
For the next three years, he underwent numerous covert operations, often accompanied by Bucky, now a war photographer, and sometimes alongside "Lucky" Jim Howlett (later the X-Men's Wolverine). During one mission Captain America was able to infiltrate Arnim Zola's facility and kill his first experimental monster, which Zola dubbed "Siegsoldat" ("Victory soldier"). The experiment's dead body then fell on Arnim Zola, seemingly killing him. During one his few leaves he met up with Gail and they spent together which would result in her becoming pregnant. He would later come into battle with Herr Kleiser, who introduced a prototype A-Bomb that was made with alien technology meant to target the White House. However they were too late to stop the bomb from commencing, but Captain America managed to get to the bomb as it is launched. In a successful attempt to stop it in mid air, he fell into the sea and was presumed dead.
Years after, the body of Captain America was found in the Arctic Ocean frozen in a block of ice. It was as if he hadn't aged a day. It has yet to be revealed whether it was due to cryogenic preservation or the super soldier serum that prevented him from aging. Initially he thought S.H.I.E.L.D. was a group of Nazi soldiers who had captured him, but eventually realized that he was in a different time. He found out his best friend Bucky Barnes was now married to his fiancée and that all his loved ones were dead.
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