Johnny Reb and Billy Yank was a Sunday comic strip drawn by Frank Giacoia from November 18, 1956, to May 24, 1959.
Some Sundays were ghosted by other artists, including Jack Kirby and Joe Kubert.
The strip told the story of the American Civil War, roughly chronicling events that had taken place 95 years earlier.
They met briefly in the first story, and "Secret Staff Order Number 191" featured both characters.
The information for this article was obtained by direct reference to the Johnny Reb and Billy Yank comic strips.