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Archduke Ferdinand and his wife are assassinated in Serajevo
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The Falaba becomes the first passenger ship sunk by German U-boat
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First use of poison gas (Germans)
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The Lusitania is sunk by a German U-boat, killing 128 American civilians.
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The Battle of Verdun was the longest battle of the entire war!
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The Sussex is sunk by a German U-Boat, resulting in the issue of the Sussex Pledge
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The Battle of the Somme was the first use of tanks in combat by British, but it was a huge failure.
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U.S. President Woodrow Wilson wins reelection. He was also won the 1912 election!
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The Battle of Verdun, the longest engagement of World War I, ends on Decemer 18 after ten months and close to a million total casualties suffered by German and French troops. (http://www.history.com/this-day-in-history/battle-of-verdun-ends)
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Germany resumes unrestrcited submarine warfare after revoking the Sussex pledge.
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President Woodrow Wilson speaks for two hours before a historic session of Congress to announce that the United States is breaking diplomatic relations with Germany. (http://www.history.com/this-day-in-history/us-breaks-diplomatic-relations-with-germany)
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The Zimmerman telegram is published in U.S. newspapers
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Tsar Nicholas II abdicates the Russian Throne during the Russian Revolution
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President Wilson discussed declaring war with Germany on April 2, 1917 with Congress, but war was formally declared on April 6. (http://www.firstworldwar.com/source/usawardeclaration.htm)
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Espionage Act essentially made it a crime for any person to convey information intended to interfere with the U.S. armed forces prosecution of the war effort or to promote the success of the country's enemies
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By the end of the third Battle of Ypres, over 250,000 are dead.
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The Battle of Camrai begins, with the frist British offenseive designed around use of the tank.
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President Wilson makes the "Fourteen Points" speech to Congress.
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Russia and Germany sign the Treaty of Brest-Litovsk, removing Russia from the war.
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Tsar Nicholas II and his family are murdered by the Bolsheviks. The murder is still a popular topic among historians.
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Fighting ceases at 11 am. Over 8.5 million soldiers are dead.
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Kaiser Wilhelm II of Germany abdicates the throne
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The United States signs a separate peace treaty with Austria
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The United States signs a seperate peace treaty with Germany.
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The United States signs a seperate peace treaty with Hungary.
