1921 - 1941

President Warren G. Harding (29th President)

Period: Mar 4, 1921 to Aug 2, 1923

President Calvin Coolidge (30th President)

Period: Aug 2, 1923 to Mar 4, 1929

Immigration Act

May 26, 1924

Revenue Act

Jul 2, 1924

President Herbert Hoover (31st President)

Period: Mar 4, 1929 to Mar 4, 1933

20th Amendment

Jan 23, 1933

President Franklin D. Roosevelt

Period: Mar 4, 1933 to Apr 12, 1945

End of Prohibition

Dec 5, 1933

Munich Agreement

Sep 30, 1938

World War 2

Period: Sep 1, 1939 to Sep 2, 1945

Battle of Britain

Jul 10, 1940

Attack on Pearl Harbor

Dec 7, 1941