 Between St. Louis and Kansas City the train ran on the Wabash Railroad, then on the Norfolk & Western which leased the Wabash in 1964.This part of the run became a separate train on June 19, 1968, retaining the "City of St Louis" name until its discontinuance in April 1969; after June 1968 the Union Pacific train was the "City of Kansas City", which lasted until Amtrak took over on May 1, 1971.The original 1946 version of the train required three consists to protect its schedule.