What were some of the technological advances that were important in the period after the Civil War?

The period
after the Civil War was an important period in terms of technological innovation in the United
States. The telegraph existed before the Civil War, but it proved invaluable in moving men and
supplies during the war. After the war, the telegraph found more commercial uses and, combined
with an ever-expanding rail system, helped to link the United States commercially. The telegraph
also allowed for the spreading of the news industry in the United States, as newspapers could
learn of events in a matter of minutes in order to print both morning and evening
editions.

Mass production in...