Railroads were very important in the American Civil War. Not only were they used for transportation, but late in the war they were also used in combat. Cars like these would be put ahead of the locomotive, and men would fire the cannon at the enemy while the train was in motion. The force of the firing cannon would move the cannon to the back end of the car, where the men would reload and then push the cannon forward again for the next shot. Don Gorsuch scratchbuilt both of these models himself.