1860 – The Pony Express mail delivery system, which used continuous horse-and-rider relays along a 1,800-mile (2,900-km) route between St. Joseph, Missouri, and Sacramento, California, was launched in the United States.
1860 – The Pony Express mail delivery system, which used continuous horse-and-rider relays along a 1,800-mile (2,900-km) route between St. Joseph, Missouri, and Sacramento, California, was launched in the United States.