HYDRA

HYDRA, or secretly going under the name of S.H.I.E.L.D. (formerly), is a Nazi and terrorist organization, and a recurring antagonistic faction in the Marvel Cinematic Universe, appearing as a major antagonistic faction in Phase One, the secondary antagonistic faction of Phase Two and a mentioned antagonistic faction in Phase Three. They serve as the main antagonistic faction of Captain America: The First Avenger, Captain America: The Winter Soldier, and Agents of S.H.I.E.L.D Seasons 1 - 3 with the Framework version of the organization being the central antagonistic faction of the Agents of HYDRA arc in Season 4 as well as in the second half of Season 5 and the secondary antagonistic faction of Season 7. It also serves as a posthumous antagonistic faction in Captain America: Civil War, and a minor antagonistic faction in Avengers: Age of Ultron, Avengers: Endgame and WandaVision. They are the arch-enemies of Captain America.