"Hail HYDRA!"

HYDRA Throne Room

HYDRA BannerHydra was shown to have been created during World War II as part of the Axis war effort.

During World War II, units of Hydra were shown to be under the command of the Baron Zemo (who was in charge of their Bio-Weapons Division), the Red Skull, and then-Lieutenant Baron Wolfgang Von Strucker. After the war, Baron Zemo would take command of Hydra until captured by S.H.I.E.L.D. While imprisoned, Von Strucker took the title of Baron, and command.

Hydra troops are armed with advanced weapons, combat robots, and vehicles. Hydra also employs special agents, such as the Grim Reaper.

Hydra would go to war with A.I.M. when MODOC refused to turn over the Cosmic Cube.  Many if not all of Hydra's troop carriers, special weapons, and Dreadnaught robots were destroyed in the battle, either by A.I.M., SHIELD, or the Avengers.  At the end of the battle, Hydra's thugs are taken into custody by SHIELD along with their leader, Baron Von Strucker.  With the rest of the Hydra leadership already in custody, Hydra appears to be currently out of comission.

For now...

HYDRA Dreadnaught Robot

HYDRA Dreadnaught Robot

HYDRA Troop Carrier

HYDRA Skull Tank