On September 23 in:

 

1519, Ferdinand Magellan sets sail from Sanlucar de Barrameda with about 270 men on his expedition to circumnavigage the globe;

 

1881, Chester A. Arthur is inaugurated as the 21st President of the United States following the assassination of James Garfield;

 

1893, Charles Duryea and his brother road-test the first American-made gasoline-powered automobile;

 

1946, the first Cannes Film Festival is held, having been delayed seven years due to World War II;

 

2001, in an address to a joint session of Congress and the American people, U.S. President George W. Bush declares a "war on terror".

 

2011,  The united States military ends its "don't ask, don't tell" policy, allowing gay men and women to serve openly for the first time.