The Transcontinental Railroad was completed 150 years ago, in 1869. In 1800s America, some saw the railroad as a symbol of modernity and national progress.

The completion of the First Transcontinental Railroad in 1869 was seen as the ultimate symbol of National Unity and Manifest Destiny. Following the trauma of the American Civil War, the railroad physically and metaphorically "stitched" the fractured nation back together, connecting the Atlantic and Pacific coasts. It represented the triumph of American industrial ingenuity and the conquest of the vast, rugged Western wilderness. For many, it was the physical embodiment of the "Manifest Destiny" doctrine—the belief that the United States was divinely ordained to expand across the continent. However, the symbol was complex and controversial; while it signaled "progress" and economic prosperity for white settlers and industrialists, for Indigenous peoples, it was a symbol of encroachment, displacement, and the destruction of the buffalo, which were central to their way of life. By slashing the travel time across the country from six months to just six days, the railroad transformed the American identity, turning a collection of isolated regions into a truly singular, integrated continental power and global economic force.