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The Archduke and his wife were assassinated in their car by Gavrilo Princip when they were visiting Bosnia.
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Austria-Hungary declares war on Serbia after the assassination.
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Germany invades the neutral country, Belgium.
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On the Eastern Front, Russia invaded east Prussia and German Poland, but were stopped by the German and Austrian forces.
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30 miles from Paris, the first Battle of Marne was fought when the French and British forces met the invading German troops.
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The Allies tried to win against the Ottoman Empire, which resulted them in joining the Central Powers.
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The Lusitania was traveling from New York to Liverpool, England when it was torpedoed by a German U-Boat and sank.
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The First Battle of Isonzo took place after Italy joined the Allied forces.
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The Battle of Verdun was a long battle fought along the Western Front between the French and the Germans.
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The Battle of Jutland was the biggest naval engagement on WW1. It was fought between Britain and Germany when Germany attempted to break the blockade. After this Germany made no more attempts to break it again.
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The Battle of Somme was a long battle between the French and Germans on the Western Front.
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President Wilson asked congress to declare war on Germany after four ships were sunk in March.
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Also known as the Twelfth Battle of the Isonzo, this battle was a victory for Austria Hungary due to German aid, the battle took place on the Italian front.
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After 2 years of defeat, the Russian population grew dicontent with the war and they revolted against their leaders, led by Vladimir, forcing Russia to form an armistice with the Central Powers, allowing them to move their forces.
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Due to the dwindling of resources, discontent among citizens, and their allies surrendering, Germany seeked an armistice with the Allied forces, leading to the end of WW1.