Captain America is the name of several fictional characters appearing in American comic books published by Marvel Comics. The first, and main, character was Steve Rogers, who was created by Joe Simon and Jack Kirby. Other characters have adopted the alias over the years and following Rogers' death his former sidekick James Buchanan Barnes (Bucky) picked up the mantle. Recent developments now have his sometime crime fighting partner Sam Wilson assuming the role.
Captain Steven Rogers, the 18th century ancestor to the World War 2 Super-Soldier serum recipient. He wore a colorful costume same as his descendant and carried a round cast iron shield as shown in Captain America: Sentinel of Liberty #6 (March 1999). But Revolutionary War Rogers acted as such before the USA existed formally as an independent country. Thus, while addressed as "Captain America", Revolutionary War Rogers is largely not considered part of the formal line.
Steve Rogers was a scrawny Army reject who was given the Super-Soldier serum, becoming the only complete success for Project: Rebirth, and the first formal person to be termed as "Captain America" as created and controlled by the Marvel Universe USA government.
As depicted in the 2003 limited series Truth: Red, White & Black, the World War II Super Soldier program of 1942, which used African American test subjects to re-create the formula that had been used to turn Steve Rogers into Captain America. The clandestine experimentation that empowered Isaiah held similarities with the Tuskegee Syphilis Study. Considered to be the "Black Captain America", Isaiah Bradley became an underground legend among much of the African-American community in the Marvel Universe. Isaiah is also the grandfather of Elijah Bradley (aka Patriot).