The Gumm Corps were created as General Gumm's personal 'army' or goons led by Gumm himself.
Major Story Arcs
General Gumm and the Gumm Corps carried out an attack on the Gotham Express in order to steal a collection of fossils which were on board the train. Gumm had stole the fossils to sell to his buyer, The Joker. The Gumm Corps and Joker's goons then began to move the fossils, but The Green Hornet, Kato, Batman and Robin showed up to stop them. A fight ensued which resulted in Robin and Kato being taken as hostages, but not before a few of the goons were beaten.