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In June of 1914, the heir to the Austro-Hungarian throne was shot and killed by assassins in order to gain land.
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Then when Russia began to mobilize due to its alliance with Serbia, Germany declared war on Russia
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This led to Germany attacking Belgium and France in August 1914.
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German U-boats, or submarines, sunk ships going between England and America. On May 7, 1915, a German U-boat sank the Lusitania, a British passenger ship sailing off the coast of Ireland. More than 100 Americans were killed. The Germans said they had put warnings in American newspapers telling passengers to stay off ships heading to the war zone.
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Germany also said the Lusitania had been carrying war supplies for England.
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1916 witnessed two of the most decisive battles of World War One – at Verdun and the Somme. 1916 is seen as the year when the armies of Britain, France and Germany were bled to deathMar 6, 2015
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In January of 1917, Germany didn't think the United States was prepared to join the war. Arthur Zimmermann, a German leader, sent a telegram to Mexico asking the country to start a border war with the United States.
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German U-boats, or submarines, sunk ships going between England ,and America and the telegram was sent to mexicans to attack.
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On April 6, 1917, the U.S. joined its allies--Britain, France, and Russia--to fight in World War I. Under the command of Major General John J. Pershing, more than 2 million U.S. soldiers fought on battlefields in France.
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January 1918 - President Woodrow Wilson outlines an elaborate peace plan to the U.S. Congress containing Fourteen Points as the basis of its establishment.
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March 3, 1918 - At Brest-Litovsk, Soviet Russia signs a treaty with Germany formally ending its participation in the war. Harsh terms imposed by the Germans force the Russians to yield a quarter of their prewar territory and over half of Russia's industries.
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April 1, 1918 - Britain's Royal Air Force (RAF) is founded upon the merging of the Royal Flying Corps and Royal Naval Air Service. By now, the British aviation industry has become the world leader.
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April 21, 1918 - Germany's Red Baron (Manfred von Richthofen) is shot down and killed by the British. The German Ace was credited with shooting down 80 Allied aircraft. He is buried with military honors by the British.
