Cattle drives were a major economic activity in the 19th and early 20th century American West, particularly between 1850s and 1910s. In this period, 27 million cattle were driven from Texas to railheads in Kansas, for shipment to stockyards in Louisiana and points east. The long distances covered, the need for periodic rests by riders and animals, and the establishment of railheads led to the development of "cow towns" across the frontier.