Army Men is a series of video games made by The 3DO Company and Global Star Software. The series is based on various wars between four sets of plastic army men: the Green, the Tan, the Blue, and the Grey. Two other factions, Red and Orange, as well as a much smaller faction, Black, also have had minor appearances. Two additional factions, the Galactic Army and the Alien Army, were introduced in Army Men: Toys in Space.
Source: Wikipedia, "Army Men (series)", available under the CC-BY-SA License.