18 abr 1869 año - Transcontinental Railroad
Descripción:
 The First Transcontinental Railroad was a 1,912-mile continuous railroad line constructed between 1863 and 1869 that connected the existing eastern U.S. rail network at Omaha, Nebraska/Council Bluffs, Iowa with the Pacific coast at the Oakland Long Wharf on San Francisco Bay. 
Añadido al timeline:
fecha:
18 abr 1869 año
Ahora mismo
 ~ 156 years ago