1921-1941 By BrodieWolfie 1921 Warren G. Harding is currently in Office 1923 Teapot Dome Scandal revealed A bribery ploy involving Warren G. Harding. 1924 Election of Calvin Coolidge 1928 Election of Herbert Hoover Feb 14, 1929 St. Valentines Day Massacre The murder of 7 men. This was in Chicago and was gang-related. Sep 1, 1929 Wall Street stock market crash Mar 17, 1930 Empire State Building built 1932 Election of Franklin D. Roosevelt 1936 Reelection of Franklin D. Roosevelt Sep 1, 1939 The start of World War II Dec 7, 1941 The United States joins World War II Dec 7, 1941 Pearl Harbor is bombed This is the reason the United States joined World War II.