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June 28 - Archduke Franz Ferdinand, heir to Austria-Hungary's throne, and his wife, Sophie, are assassinated by Serbian nationalist Gavrilo Princip.
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July 28 - Austria-Hungary declares war on Serbia.
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The War to end all Wars
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August 1 -- Germany declares war on Russia.
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August 19 - U.S. President Woodrow Wilson announces the U.S. will remain neutral.
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August 26 - The Battle of Tannenberg begins. This is the first officail battle of World War One.
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December 24 The unofficial Christmas truce is declared. On this night two opposing sides came together in a game of football and had a unoffical truce for the sake of christmas.
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April 22 - The Second Battle of Ypres begins. It is during this battle that the Germans first use poison gas.
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February 21 - The Battle of Verdun begins. The Battle of Verdun was the longest battle of World War 1 and was one of the bloodiest.
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April 6 - The United States declares war on Germany.
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January 8 - U.S. President Woodrow Wilson issues his Fourteen Points to peace.
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June 28 - The Treaty of Versailles officially ends World War 1.
