Hydra (comics)
fictional supervillain organization
Hydra are major antagonists in the Marvel Comics universe. They are the main antagonists of the Captain America franchise and major antagonists in the Avengers franchise.
Hydra was established during World War II by the German Third Reich as a secretive organization to further the Reich's goals. Though the war ended in Germany's defeat, Hydra survived and expanded into a global criminal organization dedicated to undermining society and establishing a fascist one world order.
Hydra has appeared in various media adaptations, including movies, television series, and video games. It plays a major role in the Marvel Cinematic Universe.