It originated from1812-1814, a historical legend during the American-British War. According to legend, there was an elderly meat processor named Samuel Wilson in Troy, new york. He is diligent, honest, competent and prestigious. People affectionately call him "Uncle Sam" (note: Sam is Samuel's nickname). This uncle Sam is also a patriot. He, his father and brother took part in the American War of Independence. In the 18 12 American-British War, his factory signed a contract with the government to produce barreled beef for the army. Whenever the U.S. government receives beef inspected by him personally, it will put the meat in a special wooden bucket and affix the American mark on the barrel. Because Uncle Sam's initials are US and the abbreviation of the United States is U.S., people combine these two names, meaning that the beef sold by Uncle Sam has become the property of the United States. So the locals took "Uncle Sam" as another name for the United States, and it gradually spread.

From 65438 to 1930s, American cartoonists gave the image of "Uncle Sam" according to historical legends, and a tall, thin and bearded old man appeared. He is wearing a dotted top hat, a red, white and blue tuxedo and striped pants (the pattern of the American star-spangled banner). Although white-haired and bearded, he is full of vitality and dignity. Since then, this image has become a symbol of the United States. Uncle Sam's industrious and cheerful personality and patriotic enthusiasm reflect the nature and spirit of the American people. Therefore, in 196 1 year, the US Congress officially recognized "Uncle Sam" as the national symbol and representative of the United States.

American nicknames include Uncle Sam, Brother Jonathan and Yankee. "Jonathan Brothers" represents Americans, and originated from "Jonathan trumbull", a good friend, American national hero and revolutionary in Washington (17 10- 1785). It is said that Washington often asks him questions and affectionately calls him "Brother Jonathan". As for the "Yankee", it was originally designated as a colonist living in New England in the northeastern United States. During the American Civil War (186 1- 1865), the meaning of "Yankee" expanded. Soldiers in the south call soldiers in the northern States "Americans". During World War I (1914-1918), "Yankee" was simplified to "Yankee". As soon as the song "The Yankees are coming" was sung, Europe's struggling allies cried with joy. Since then, "Yankee" has become synonymous with American soldiers or Americans to Europeans. In Latin America, Yankee is spelled Yanqui. In the 1950s, when the national independence movement was surging, the Latin American people, who had been exploited and oppressed by the United States for a long time, issued Yanqui Go Back! Go home, Yankee! ) Oh, it can be said that it is a huge blow to the economic interests and political influence of the United States.