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Archduke Franz Ferdinand of Austria was assasinated on June 28, 1914 in Sarajevo by Galvrilo Princip. His assasination was the spark that started the First World War.
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On July 28 1914 Austria-Hungary declares war on Serbia, wanting revenge on the Serbian assasin. Austria-Hungary and Serbia are first two countries in the war. The signifigance of this that it is the beginning of the war and Serbia was the country that sparked the war.
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September 5-12, 1914 was the First Battle of Marne. This war resulted in an allied victory against Germany Army under Chief of Staff Helmuth von Moltke the Younger. This was the first war where trenches were used.
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The Second Battle of Ypres was the first battle Germans used Poison Gas.
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The battle of Verdun begins on February 21, 1916. It was one of the bloodiest wars in human history.
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July 1, 1916 the Battle of Somme began. During this battle Tanks were first introduced to battles. It is also one of the largest battles that happened during WW1. More than 1,000,000 people were wounded and killed, this was one of the bloodiest battles in human history.
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On April 2, 1917, President Woodrow Wilson aske a special joint session of Congress for the Declaration. On April 6, 1917 President Wilson declared war.
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The Battle of Passchendaele is also know as the Third Battle of Ypres. They attacked with the goal of overwelming the central powers.
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The Second Battle of Marne was the last major German Spring Offensive on the Western Front during WW1.
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The Treaty of Versailles was a peace treaty that was signed on June 28, 1919 exactly 5 years after the archduke was assainated, that ended the first world war.
