Portal:United States/Anniversaries/September/September 14
- 1763 – Seneca warriors defeat British forces at the Battle of Devil's Hole during Pontiac's War.
- 1814 – Battle of Baltimore: The poem Defence of Fort McHenry is written by Francis Scott Key. The poem is later used as the lyrics of The Star-Spangled Banner.
- 1901 – Theodore Roosevelt became President of the United States at age 42, the youngest person ever to do so, (1904 pictured) eight days after William McKinley was fatally wounded in Buffalo, New York.
- 1975 – The first American saint, Elizabeth Ann Seton, is canonized by Pope Paul VI.
- 1994 – The Major League Baseball season is canceled because of a strike.
- 1998 – Telecommunications companies MCI Communications and WorldCom complete their $37 billion merger to form MCI WorldCom.