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Archduke Franz Ferdinand was assassinated by a member of a splinter group called the Black Hand -
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Austria-Hungary declares war on Serbia -
Russian army won during the longest siege in Europe during the first world war. -
18,000 artillery shells were fired containing tear gas were fired on the Russian forces -
This battle was the first time Germans used poison gas as a weapon. -
A German sub torpedoed Lusitania killing 1,200 people -
The French won the battle of Verdun against Germany, with 400,000 casualties. -
The British launched an attack in the Somme River Area to pull German Troops away from Verdun. -
A coded message was sent from Germany to Mexico asking to join the war if the U.S. joined. -
Czar Nicholas the II wanted to lead, but had no experience, so russian forces revolted to leave the war. -
The U.S. sided with the allies and provided food and soldiers. -
Established a military draft as a way of making people join armed forces. -
A British attack followed by the largest German counter-attack. -
Vladimir Lenin signs the treaty with Germany -
The last major German attack on the Western Front