First Transcontinental Telegraph Line Completed in the USA
What happened
The first transcontinental telegraph line was completed on 24 October 1861, connecting the East Coast to San Francisco and instantly rendering the Pony Express obsolete by transmitting messages coast to coast in minutes.
Literary impact
Whitman celebrated the telegraph as a form of democratic communion binding the American continent; it changed newswriting and literary serialization by enabling instantaneous long-distance reporting, reshaping both the form and the economics of American print culture.
Source: Wikipedia