The Missouri-Kansas-Texas Railroad (MKT) was incorporated in 1870. In its earliest days the MKT was commonly referred to as "the K-T", and soon evolved into "the Katy". Headquartered in Dallas, TX, the Freight Line served Eastern Texas, Oklahoma, Southeastern Kansas, and Central Missouri. MKT also ran an impressive "named" passenger fleet! At the end of 1970, MKT operated 2623 miles of road and 3765 miles of track. MKT's early diesels were red and red-orange, but after 1971, locomotives, cabooses, and other rolling stock were painted green with yellow stripes, lettering and numbering. In 1988, its successor became the Union Pacific Railroad.