The Roman Empire was under extreme strain during the war, and was forced to turn to slave labour to a large degree to produce most of their aircraft (including making and test-flying copies of the "Rainmaker" Airframe, with some modifications). As a result of cruel treatment by occupying Romans, more than one North-European tribe rebeled, taking over local factories for their own use. Tribal aircraft had a colour representing their tribe (Green or purpla was a common choice) painted over the Roman-Red paint-sceme, and a modified canopy. these Tribes eventually united and forced the Romans into a two-front war. For more on the story behind these aircraft, please read the descriptions of my previous creations, and my blog post :)