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Archduke, Franz Ferdinand, Killed
Archduke Franz Ferdinand was assassinated. He was killed by a Serbian nationalist named Gavrilo Princep. -
Austria-Hungary Declares War on Serbia
Because Gavrilo Princep, a Serbian nationalist, shot the Archduke of Austria-Hungary, Austria-Hungary declared war on Serbia. -
First use of Gas as a Weapon by the Germans
During World War I, different countries were making new weapons. The Germans were the first to use chemical warfare. They used poisonous gas. It was so effective that the Allies started to use it. -
Sinking of the Lusitania
The Germans fired a torpedo from a U-boat. The torpedo hit a British passenger ship called the Lusitania. More than 1,000 people died and among them were 128 Americans. -
Wilson Re Elected; Pledged American neutrality
Wilson defeated Charles Evan Hughes. He pledged to remain neutral in the war in Europe. The neutrality did not last long, and the US entered the war. -
Zimmermann Note
Arthur Zimmerman was a German who thought it was a good idea to send a telegram to Mexico. The telegram said for Mexico to fight with the US. The US eventually got the telegram. That was the last straw for the US. -
US Declares War
The Zimmermann Note was the last straw for Wilson and Wilson declared war on Germany. Socialists and pacifists opposed the war. -
Bolsheviks Led by Lenin Overthrow Russian Government
A revolution took place in Russia towards the end of World War I. The group that formed this revolution was called the Bolsheviks. The Bolsheviks were led from Vladimir Lenin. Together they overthrew the Russian government. -
War Ends
The armistice began on this day. Under the terms of the armistice, Germany had to withdraw all land forces west of the Rhine River, to withdraw its fleet to the Baltic Sea, and to surrender huge amounts of equipment. -
Treaty of Versailles
Under its terms, Germany had to accept full responsibility for the conflict. Germans had to pay the Allies billions of dollars. Germans had to disarm completely and give up overseas colonies and some territory in Europe.