Armory was a bank robber seen robbing a bank in Metropolis City.
In the Batman Beyond series, Jim Tate worked with the Special Forces before working as weapons maker for the Wayne-Powers company. Tate later married Lorraine and gained a stepson Jared. After buying a new car for his stepson's birthday, Jim learns that Paxton Powers disintegrated his division, forcing Jim to look for a job. A illegal company hired Jim Tate to steal weapons from other companies.
Jim became the Armory and used a battle suit to break into Wayne-Powers and steal a prototype of weapon's specs. During his theft, he came into an ultimatium with the police and the Batman. Using his suit's weapons, Armory escaped from the police and Batman and delivered the weapon to the company's designer who paid Armory for the robbery.
Jim became indifferent while working as robber, working in his workshop for hours. Armory latter robbed from another company and escaped from Batman and the police again. Meanwhile, Jared sneaked into his stepfather's workshop to find out what he has been up to. Listening to Jim talking with the designer, Jared noticed that Armory was responsible for the robberies and shortly Lorraine found out too. Jim told them that he did this for them. Batman arrived and fought the designer who was knocked cold by Jim Tate.
Jim gave himself to the police and was given lenient sentence for helping Batman.