Featured Characters: Captain America (Steve Rogers) (First appearance) (Joins Operation: Rebirth and United States Army) Supporting Characters: Operation: Rebirth (First appearance; unnamed) United States Army General Chester Phillips (First appearance; unnamed) Bucky (Bucky Barnes) (First appearance) FBI (First appearance) J. Arthur Grover (First appearance; dies) Agent X-13 (First appearance) Professor Reinstein (First appearance; dies) Antagonists: Nazis Fifth Column Gestapo (First...| Marvel Database