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Assassination
Archducke Franz Ferdinand assasinated -
Austria-Hungary
Joined the war -
Serbia
Joined the war -
Declaration Of Neutrality
U.S. declares that they will remain neutral -
Great Britain
Joined the war -
Belgium
Joined the war -
France
Joined the war -
Russia
Joined the war -
Germany
Joined the war -
Ottoman Empire
Joined the war -
The Lusitania
The lusitania was sunk by the German U-boats, killing Americans -
Italy
Joined the war -
Bulgaria
Joined the war -
Portugal
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Romania
Joined the war -
Sussex Pledge Made
German U-boats agreed to warn American ships before sinking them -
Zimmerman Note
Germany promised Mexico, that if the attacked the U.S., they would give the land from the U.S. -
Sussex Pledge ended
Germany did not follow through with the pledge -
American Ships targeted
American ships targetted by German U-boats -
Declaration of War
U.S. declared war after they tried to remain neutral -
Greece
Joined the war
