1845 Florida Joins the United States: On this day, Florida was formally admitted as the 27th state of the U.S. 1847 First Senate Brawl in U.S. History: A physical altercation erupted between two senators over intense political disagreements. 1931 ‘The Star-Spangled Banner’ Officially Adopted: The United States recognized its national anthem on this date. 1913 … Continue reading This Day in History