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  A British passenger ship, sunk by a German U-Boat.
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  Germany invades Belgium, beginning World War I.
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  The Allies stopped the German invasion of Paris.
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  The French held their line against a German offensive until December of the same year, during the longest battle of the war.
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  The United States enters into the first World War, declaring war on the Central Powers.
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  An indecisive naval battle between German and British fleets.
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  Germany resumes unrestricted submarine warfare in European waterways. This act, more than any other, draws the United States into the war and causes the eventual defeat of Germany.
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  President Wilson outlines his case for war to Congress.
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  Russian revolutionaries setup a Communist goverment, attempting to make peace with the Central Powers.
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  A series of German Attacks along the Western Front.
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  The british Royal Air Force is formed.
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  The turning point of the war, in which the Allies defeated the Central Powers and advanced continuously until the end of the war.
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  General Pershing leads the American Army to Victory.
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  General Pershing leads the American Army to Victory.
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  The Austrian-Hungarian Empire surrenders.
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  The Central Powers, tired of fighting, sign the armistice that ends World War 1