1890-1945 By Thy Period: 1890 to 1920 Progressive Era 1893 Panic of 1893 Period: 1901 to 1909 Theodore Roosevelt's presidency 1907 Gentleman's Agreement Period: 1909 to 1913 William H. Taft's presidency Period: 1913 to 1921 Woodrow Wilson's presidency Period: 1914 to 1918 World War 1 1917 Russian Revolution Period: 1917 to 1920 First Red Scare Aug 18, 1920 19th Amendment ratified 1921 Emergency Quota Act May 31, 1921 Sacco-Vanzetti Trial Aug 8, 1925 KKK march on Washington Aug 27, 1928 Kellogg-Briand Pact Period: 1929 to 1939 The Great Depression Period: 1929 to 1933 Herbert Hoover's presidency Oct 29, 1929 Stock Market Crash Period: 1933 to 1945 Franklin D. Roosevelt's presidency Period: 1939 to 1945 World War 2 Dec 7, 1941 Attack on Pearl Harbor Dec 8, 1941 U.S. enters WW2 Jun 6, 1944 D-Day Aug 6, 1945 Atomic bombing of Hiroshima Aug 9, 1945 Atomic bombing of Nagasaki