-
Franz Ferdinand Assassination
The assassination of the Archduke of Austria-Hungary caused the beginning of World War I. -
Austria-Hungary declares war on Serbia
Archduke was killed by Gavrilo Princip who was from Serbia. Archduke was from Austria-Hungary. Therefore Archduke's death made Austria-Hungary declare war on Serbia.This caused the war. -
First use of gas as a weapon by the Germans
During the war, the Germans introduced gas as a weapon. The Germans use Mustard Gas which could kill by blistering the lungs and throat if inhaled in large quantities. However, in order for it to cause blisters all over the body it had to soak into their woolen uniforms. -
Sinking of the Lusitania
The sinking of Lusitania occurred on Friday, May 7th 1915. The ship was identified and torpedoed by German U-Boat. It sank in 18 minutes. -
Wilson re-elected; pledge American neutrality
Wilson is re-elected using the slogan "He kept us out of war." One months after Wilson's election America goes into war. -
Zimmermann Note
The Zimmermann telegram stated that the Mexicans would attack the U.S from the south as a distraction. So the Germans could attack the British and America wouldn't interfere. Little did Zimmermann know that the note was intercepted by the British, decoded and sent to President Wilson. -
U.S declares war
There are many reasons why the U.S declared war o Germany. One of those many reasons are because the German sank the Lusitania. The main reason is because of the Zimmermann Note. -
Bolsheviks led by Lenin overthrow Russian government
On November 7, 1917, Russia’s Bolshevik Revolution took place as forces led by Vladimir Ilyich Lenin overthrew the provisional government of Alexander Kerensky. -
War ends
Germany finally surrenders and all the nations agree to stop fighting. While the terms of peace were being negotiated. -
Treaty of Versailles
Germany and all allied nations signed the Treaty of Versailles formally ending the war
