Early 20th Century Dates -- U.S. History By oconnorms May 18, 1896 Plessy v. Ferguson Streetlaw.org Feb 15, 1898 Spanish American War Sinking of the USS Maine Apr 6, 1917 World War I -- The Great War National World War I Museum›› Oct 26, 1917 Russian Revolution Russian Revolution Sep 29, 1929 The Great Depression The Great Depression Dec 7, 1941 World War II History.com
