Why is the United States called Uncle Sam?

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According to legend, there was a man named Samuel Wilson in Troas, new york. He is the owner of a meat processing factory. He is diligent, honest and optimistic, and is deeply respected by people. Everyone affectionately called him "Uncle Sam".

18 12 After the American Revolutionary War began, Uncle Sam's factory accepted a contract to produce barreled beef exclusively for the American army. Every time the U.S. government receives beef that has passed the inspection, it will put the meat in a special wooden barrel and mark it with the word "America". Because the initial letter of the word "Uncle Sam" is "US" and the abbreviation of the United States is "US", people combine these two names into one, which means that the beef passed by "Uncle Sam" has become the property of the United States. Since then, "Uncle Sam" has been regarded as a nickname of the United States and gradually spread widely.

During the period of 65438-1930s, American cartoonists gave "Uncle Sam" a concrete image according to historical legends, and a cartoon image of a tall, thin old man with a goatee appeared. He is wearing a tall hat decorated with a star emblem, a red, white and blue tuxedo and striped trousers (the pattern of the American star-spangled banner). The tall, smiling old man has become a symbol of America.