Although technically originally introduced in Marvel publications in the 1970's, various retcons of the history of Captain America (Steve Rogers) has expanded the history of Fred Davis Jr. to span publications published over 70 years. Below is his abridged history. For an abridged version, see the Unabridged history of Fred Davis Jr.

New York Yankees

In 1942 Fred Davis was a bat-boy for the New York Yankees. The Invaders had been captured and brainwashed, leaving only Bucky free. As part of a plan to capture the mind-controlled heroes, Bucky asked Fred to impersonate him, which the patriotic lad did without hesitation.

Partners with William Nasland

Three years later, Bucky and Captain America were reportedly killed. President Truman realized that the news of their deaths could be a severe blow to allied morale and asked William Naslund, the hero known as the Spirit of '76, to assume the identity of Captain America and for Fred to once more wear the costume of Bucky and operate alongside the Invaders to maintain the pretense that America's premiere heroes were still alive. The new Captain America and Bucky finished the rest of the war and continued to fight crime with the All-Winners Squad. Naslund was killed in 1946 fighting the android Adam II, and Captain America's identity passed to Jeffrey Mace, the Patriot.

Partners with Jeff Mace

Davis assisted Mace until 1948, when he was shot and wounded, forcing him to retire and leaving him with a permanent limp.

V-Battalion

In 1951, Davis joined the V-Battalion, a secret organization that hunted war criminals, and eventually became one of its leaders on the Penance Council. He served the V-Battalion in both a leadership role in the Penance Council, and as an engineer.