Uncle Sam (initials U.S.) is a common national personification of the American government that according to legend came into use during the War of 1812 and was supposedly named for Samuel Wilson. The first use of Uncle Sam in literature was in the 1816 allegorical book The Adventures of Uncle Sam in Search After His Lost Honor by Frederick Augustus Fidfaddy, Esq. An Uncle Sam is mentioned as early as 1775, in the original â€śYankee Doodleâ€ť lyrics of the Revolutionary War. It is not clear whether this reference is to Uncle Sam as a metaphor for the United States. The lyrics as a whole clearly deride the military efforts of the young nation, besieging the British at Boston.