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Archduke Ferdinand is killed
The prince to the Austrian-Hungarian throne is killed by a Serbian man named Gavrilo Princip -
Austria-Hungary declairs war on Serbia.
This then later causes Germany to declair war on France and Russia. -
The Ottoman Empire declaires war on the allied powers
They came into the war via a surprise attack on Russia -
Germans begin to use Submarines
This was a new way to sneak by ships with stealth. -
The Lusitania is sunk.
The sinking of this British luxury liner causes many Americans to support the allied nations -
Bulgaria declaires war on Serbia
This makes Bulgaria officially enter the war. -
British intercept German message
The Germans try to get Mexico to attack the United States which makes the U.S. later declairing war on Germany -
Russian Revolution begins
Tsar Nicholas II is removed from government -
The U.S. enters the war
The United States declaires war on Germany changing the tide of the war -
Russia leaves the war.
The agree to peace with the Central Powers. -
Woodrow Wilson issues his Fourteen Points
The Fourteen point are his plan for peace. -
Germany agrees to an armistice
This causes the fighting to stop on Nov. 11th -
The Treaty of Versailles is signed by Germany.
This officially brings WW1 to a close.