Roosevelt Corollary
Gentlemen's agreement
Dollar diplomacy
General "Black Jack" Pershing in Mexico and Europe
U-boats and unrestricted submarine warfare
Lusitania
Zimmerman telegram
War Industries Board
Hoover and the Food Administration
McAdoo and the US Railroad Administration
Lenin, Trotsky and the Bolsheviks
Creel and the Committee on Public Information
Espionage & Sedition Acts, 1917, 1918
Schenck vs US and the "clear and present danger" doctrine
East St. Louis race riot, 1917; Chicago race riot, 1919
18th and 19th amendments
Influenza epidemic, 1918
Wilson's 14-point plan
Treaty of Versailles and the League of Nations
Red Scare, 1919-1920