Births on February 21

Tadd Dameron, American pianist and composer (d. 1965)

Tadley Ewing Peake Dameron (February 21, 1917 – March 8, 1965) was an American jazz composer, arranger, and pianist.

22 Jan

Woodrow Wilson
World War I: President Woodrow Wilson of the still-neutral United States calls for "peace without victory" in Europe.
15 Mar

Nicholas II of Russia
Tsar Nicholas II of Russia abdicates the Russian throne ending the 304-year Romanov dynasty.
2 Apr

Woodrow Wilson
World War I: United States President Woodrow Wilson asks the U.S. Congress for a declaration of war on Germany.
5 Jun

Conscription
World War I: Conscription begins in the United States as "Army registration day".
27 Jul

Battle of Passchendaele
The Allies reach the Yser Canal at the Battle of Passchendaele.