Indeed. Even though historians are not entirely certain about the origin of Uncle Sam Samuel Wilson is one of the best guesses.
During the War of 1812, Wilson was in the business of slaughtering and packing meat. He provided large shipments of meat to the US Army, in barrels that were stamped with the initials "U.S." Supposedly, someone who saw the "U.S." stamp suggested -- perhaps as a joke -- that the initials stood for "Uncle Sam" Wilson. The suggestion that the meat shipments came from "Uncle Sam" led to the idea that Uncle Sam symbolized the federal government.
Speaking of initals on barrels, I heard of food barrels being marked with B.C. for Brigade Commissary during the Civil War. Looking at the content of the barrels the men however "interpreted" the B.C. as before Christ
Your turn Nick.