(See Sidebar) The character was created by Roy Thomas and John Buscema, and debuted as a member of the team of superheroes called the Squadron Supreme in The Avengers #85 (Feb. 1971) as American Eagle, then as Cap'n Hawk in The Avengers #148 (June 1976), and finally as Blue Eagle in Squadron Supreme #1 (Sept. 1985).

James Dore Sr. operated during World War II under the persona of American Eagle, outfitted with a pair of wings which he obtained through unknown means.

He began his career as a superhero when he inherited the mantle of the American Eagle from his father and joined the Squadron Supreme.

The Squadron members were freed by the Defenders, and the two teams battled and defeated the Overmind and his ally Null, the Living Darkness.

During the battle, Blue Eagle killed the Black Archer with his mace, but lost the use of his wings after Lamprey drained the artificial gravity effect from them.

[10] Blue Eagle's wings were later adopted by fellow Squadron member Lady Lark, as she had grown to love Dore shortly before his death.

Blue Eagle wears a specially designed flying suit of synthetic stretch fabric equipped with artificial wings on his back enabling natural winged flight, that was designed by his father James Dore Sr. (the original American Eagle) and his mother Adrian Dore.

Following the fight with the Siege Society, Tom Thumb, Nighthawk, and Blur mourn the deaths of their fallen comrades Amphibian, Arcanna Jones, Blue Eagle, and Golden Archer.