World War One By 26westm+ Jun 28, 1914 Archduke Franz Ferdinand is assassinated Jul 28, 1914 Austria-Hungary entered the war Aug 1, 1914 Russia enters war Aug 1, 1914 Germany enters war Aug 3, 1914 France enters war Aug 4, 1914 Great Britain enters war Aug 5, 1914 5 colonies of Britain offered military and financial assistance Aug 23, 1914 Japan enters war May 23, 1915 Italy enters war Apr 6, 1917 United States enters war Apr 6, 1917 United States enters war Jan 8, 1918 Woodrow Wilson delivers 14 point message Dec 10, 1920 Woodrow Wilson received nobel peace prize