Our latest series of patriotic boxcars puts a different spin on the "rhythm of the rails!" As these cars travel along, you'll hear the familiar "clickety clack" but in time to well-known military marches. In addition to the cars themed with our Union Pacific WWII poster art train, we are also offering them based on the large 1951 order for PS-1 boxcars by the Department of Defense in Army, Navy, Marine and Air Force decoration. Sounds play automatically in motion and work with any O Gauge control system.