In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. In 1860 the U.S. Congress arranged among the telegraph companies a competition to create a national line. The winner was Western Union. July 3, 1884 the company's shares were included in the calculation base for the newly created stock index Dow Jones Transportation Average. 1970 - a new service called Western Union made so that the time in all of American civil services was the same. Western Union made so that the time in all of American civil services was the same.