The United States ratified a peace treaty with England that ended the
Revolutionary War and established the US as a sovereign nation. John 
Adams, Thomas Jefferson, and James Madison took part in negotiating 
the treaty with King George lll.

The United States Air Force terminated Project Blue Book, a series
of studies of Unidentified Flying Object (UFO) sightings, after it was determined that there was no evidence of extraterrestrial spaceship
activity behind thousands of reports. The project, which started in
1952, ceased all activity in January of 1970.

 
The United States marine Corps was formed on this date in 1775 under the
authority of the Continental Congress.