History
The past history of the terrorist organization known as Hydra on Earth-7812 likely mirrors that of their Earth-616 counterparts. Much like on Earth-616, Hydra would set their sights on eliminating Captain America. However, in this reality, Rick Jones had become the Hulk instead of Bruce Banner. As a result, Rick would never meet Captain America when he was revived by the Avengers. Rick would happen upon Captain America as he was being attacked by a number of Hydra's minions and help him in fighting them off.
Impressed, Cap would train Rick to become the new Bucky, and in their subsequent battle against Hydra, Rick would transform into the Hulk and easily beat the Hydra soldiers. Captain America would talk the Hulk out of killing any of the soldiers, shaming the Hulk so badly he would leave.
Hydra's subsequent activities following this remains unrevealed.