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Germany uses U boats to sink ships.
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The assassination led directly to WWI, when Austria-Hungary subsequently issued an ultimatum to the Kingdom of Serbia, which was partially rejected.
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The trigger for the war was the assassination of Archduke Franz Ferdinand of Austria, heir to the throne of Austria-Hungary
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Germany waged submarine warfare against the United Kingdom which had implemented a naval blockade of Germany.
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French commanders diverted many of the divisions intended for the Somme and the "supporting" attack by the British became the principal effort.
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The 33rd quadrennial presidential election
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Instructed the ambassador, Count Johann von Bernstorff, to offer significant financial aid to Mexico if it agreed to enter any future U.S-German conflict as a German ally.
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authorized the United States federal government to raise a national army for service in World War I through conscription.
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All merchant ships crossing the Atlantic Ocean would travel in groups under the protection of the British
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The Espionage Act of 1917 is a United States federal law passed on June 15, 1917, shortly after the U.S. entry into World War I.
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The influenza pandemic of 1918-1919 killed more people than the Great War, known today as World War I.
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The Fourteen Points was a statement of principles for peace that was to be used for peace negotiations in order to end World War I.
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the new Bolshevik government of Soviet Russia and the Central Powers that ended Russia's participation in WWI.
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an Act of the United States Congress that extended the Espionage Act of 1917
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The Armistice of 11 November 1918 was the armistice that ended fighting on land, sea and air in World War I between the Allies and their last opponent, Germany.
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Four days after the Japanese attack on Pearl Harbor and the United States declaration of war against the Japanese Empire, Nazi Germany declared war against the United States, in response.
