
During the 1860s and 1870s, a popular cartoonist named Thomas Nast used Uncle Sam in several cartoons and helped spread the symbol. Thomas Nast also created and popularized other now famous symbols such as the donkey representing the democratic national party and the elephant to represent the Republican national party. On September 7th, 1983 "Uncle Sam" became the official nickname of the United States government. The symbol of Uncle Sam would become historically significant because of its use in both pro and anti-government propaganda from the nineteenth century to today. The most famous propaganda is most likely the one you have seen of him pointing his long finger directly at you. This was of course used by the United States Army for recruitment purposes.
"United States nicknamed Uncle Sam." 2008. The History Channel website. 13 Sep 2008, 06:54 http://www.history.com/this-day-in-history.do?action=Article&id=52848.