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Franz Ferdinand's Death
The Archduke of Austria,Franz Ferdinand,was assassinated by a Serbian military member named Princip.This is said to have triggered the war. -
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The Allies vs the Central Powers
Over the next four years,other countries went on either Austria-Hungary's side or Serbia's side.Those who supported Serbia were called the Allies,and those who supported Austria-Hungary were called the Central Powers.The main Allies were Britain,France, Serbia,Russia,Italy,Belgium,and the United States.The main Central Powers were Austria-Hungary,Germany,Bulgaria,and the Ottoman Empire. -
America Enters the War
At the beginning of the war,the U.S. stayed neutral,but after Germany sank many American submarines and ships or ships that contained American passengers,the U.S. started to changed their mind.This got even worse when Germany wanted to form an alliance with Mexico,which was revealed by British intelligence groups.The U.S. officially entered the war in April 6,1917. -
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Significant American WW1 members
Americans contributed a lot during the war.Herbert Hoover led hunger-relief efforts in Europe.John J. Pershing and his doughboys were on the Western Front.Lawrence Tyson led the 59th Brigade to break down the Hindenburg Line.Alvin York was one of the most decorated American soldiers during the war. -
Treaty of Versailles and the League of Nations
The Treaty of Versailles ended the state of war between Germany and the Allies.All countries needed the war to end because they were damaged.Because of some policies,the U.S. rejected the treaty.The other countries wanted to make a peace group called the League of Nations,but the U.S. rejected that as well.