1814: September 14 - Francis Scott Key writes "The Star-Spangled Banner." It officially becomes the national anthem in 1931.
1818: Flag adds 5 stars for Tennessee, Ohio, Louisiana, Indiana, and Mississippi but limits stripes to 13 (total of 20 stars). Act of April 4, 1818 provided for 13 stripes and one star for each state. Each new star to be added to the flag on the 4th of July following the admission of each new state.
1819: Flag adds 1 star for Illinois (total of 21 stars).
1820: Flag adds 2 stars for Alabama and Maine (total of 23 stars). First flag on Pikes Peak.
1822: Flag adds 1 star for Missouri (total of 24 stars).
1836: Flag adds 1 star for Arkansas (total of 25stars).
1837: Flag adds 1 star for Michigan(total of 26 stars).
1845: Flag adds 1 star for Florida (total of 27 stars).