This 80sTees.com exclusive GI Joe t-shirt features a collage of the artwork that appeared on the boxes for the Mainframe, Gung Ho and Leatherneck action figures. These Semper Fi soldiers are the most popular of all the Marine soldiers. Mainframe specializes in computer technology, Gung Ho is a brawling Sergeant Major, and Leatherneck is an overbearing Gunnery Sergeant. When these Marine soldiers join forces, they are an unstoppable force; and they are always happy to stop Cobra from achieving their dream of world domination.