Births on May 21

Charles Léon Hammes, Luxembourgian lawyer and judge (d. 1967)

Charles Léon Hammes (21 May 1898 – 9 December 1967) was a Luxembourg lawyer, judge and the third president of the European Court of Justice.

20 Apr

Spanish-American War
President William McKinley signed a joint resolution to Congress for declaration of War against Spain, beginning the Spanish-American War.
10 Jun

United States Marine Corps
Spanish-American War: U.S. Marines land on the island of Cuba.
1 Jul

Battle of San Juan Hill
Spanish-American War: The Battle of San Juan Hill is fought in Santiago de Cuba.
3 Jul

Battle of Santiago de Cuba
A Spanish squadron, led by Pascual Cervera y Topete, is defeated by an American squadron under William T. Sampson in the Battle of Santiago de Cuba.
13 Sep

Photographic film
Hannibal Goodwin patents celluloid photographic film.