Archduke Franz Ferdinand - His assassination set off a chain of events that caused nations to take sides and war to break out
Triple Entente - Include France, Great Britain, and Russia
Zimmermann Telegram - This contained a suggestion of an alliance between Mexico and Germany that deeply angered the American people
Woodrow Wilson - His fourteen points became the basis for peace negotiations at the Paris Peace Conference which began in December 1918
Triple Alliance - Include Germany, Austria-Hungary, and initially Italy
Imperialism - A nation's policy of extending its power and dominion, especially by conquering territories
Lusitania - This British liner was sunk by a German U-boat using unrestricted submarine warfare.