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Franz Ferdinand (archduke of Austria-Hunagry) was assassinated by Gavrilo Princip.
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Austria-Hungary declares war on Serbia after the assassination of Franz Ferdinand.
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Ottoman Empire (Turkey) and Germany sign a secret treaty of alliance.
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Germany declares war on France!!
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Germany invades Belgium, leading Britain to declare war on Germany.
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Austria-Hungary invaded Russia.
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27,000 French soldiers die on this single day in an offensive thrust to the east of Paris, towards the German borders.
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The German army, led by Erich Ludendorff and Paul von Hindenburg achieves greatest victory of the war, on the Eastern front against Russia at the Battle Of Tennenberg.
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The first trenches of the Western Front are dug.
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Unofficial Christmas Truce declared by soldiers in the trenches along the Western Front.
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War becomes "Total War" with German Zeppelin air raid on England.
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Germany declares a submarine blockade of Great Britain. Any ship approaching England is considered a legitimate target.
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U-boats sink the Lusitania. 1,198 civilians, and 128 Americans die.
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Germany responds to U.S. anger by ceasing to sink ships without warning.
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British use gas in battle near Loos, but shifting winds cause 60,000 British casualties.
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US President Wilson publicly warns Germany not to continue unrestricted submarine warfare policies.
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Woodrow Wilson was re-elected President of The United States with campaign slogan: "He kept us out of War!'
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An estimated 1 million casualites and no breakthrough for the Allies. Bristish introduce the tank, an effective weapon but far to few to make much of a difference.
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Reich Foreign Secretary Zimmermann's telegram to Mexico urging her entry into war against the United States is discovered and translated by the British.
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Germany again declares unrestricted submarine warfare.
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The United States passes the Selective Service Act empowering the Federal Government to draft men for the armed forces.
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The first American Expeditionary Force lands in France.
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The new Russian government, represented by Leon Trotsky, signs an armistice with Germany.
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British capture Jerusalem from the Turks for her Arab allies.
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President Woodrow Wilson declares his 14 points as the path to permanent world peace.
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Germans launch the first of five major offensives to win the war before American troops appear in the trenches. German advance is finally stopped in late June.
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Baron von Richthofen, "the Red Baron" is killed in air dog-fight.
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Germans on the banks of the Marne (near Paris) are stopped by American Forces at Chateau-Thierry.
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Former Tsar Nicholas II, his wife, children, and members of his entourage are murdered by the Bolsheviks.
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At eleven o'clock on the eleventh day of the eleventh month of 1918, the war ends as Germany and Allies sign an Armistice.
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Woodrow Wilson sets sail for the Paris Peace conference!
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Peace Treaty signed by German delegates and Allies in Versailles.
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President Wilson brings his campaign for the ratification of the Treaty of Versailles and its League of Nations to the American people.
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Wilson collapses and his whistle-stop tour of the country is over.