U.S. 20 Star Flag, 1818 - 3rd official U.S flag.

U.S. 20 stars and 13 stripes confirming Mississippi as the 20th state.
This period example was made to indicate the admission of Mississippi as the 20th state into the union on December 10, 1817; and would remain accurate until the admission of Illinois on December 3, 1818, a period of only 358 days.

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