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Archduke Franz Ferdinand and his wife were assassinated while visiting Sarajevo, Bosnia. He was next in line for the Austro-Hungarian throne. The killings set of decades old tensions in Europe and started WWI.
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After the assassination of Franz Ferdinand the Austria-Hungary empire blamed it on Serbia. This angered both nations. That is when Austria-Hungary declared war on Serbia.
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On April 22, 1915 the Germans used poisonous gas against the Allied soldiers. They fired more than 150 tons of gas. That was the first major gas attack by the Germans and it was a devastating loss for the Allies.
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On May 7, 1915 a German U Boat torpedoed the Lusitania. More than 1,100 people died in the tragedy. Including over 100 Americans. This made the U.S. angry
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On November 7, 1916, president Wilson was reelected. After the election he declared the U.S neutral during the war but the U.S. was struggling because things in Europe were troubling the U.S.
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This was a telegram that was sent from Germany to Mexico. Germany wanted to form an alliance with Mexico to flank the U.S. This plan failed after the British intercepted the telegram and reported it to the U.S.
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The Russian people didn't like the autocracy government. They wanted a democracy. So the Russian people overthrew the Russian government and declared war on Germany.
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At the beginning of WWI President Woodrow Wilson declared the U.S. neutral. A couple years later some innocent Americans died from German U Boats. The Germans tried to ease the U.S. by warning the ships before they attack. The U.S. was angry after that and decided to enter the war.
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On November 11, 1918, Germany gave up and ended the war. The war left nine million soldiers dead and twenty one million people were wounded. At least five million died of disease
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The Treaty of Versailles officially ended WWI. The treaty put Germany's boundaries out of liability. Germany also agreed to pay the reparations. The French had a split though. Some wanted to destroy Germany so they wouldn't come back into war and others didn't want that.
