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Two shots in Sarajevo ignited the fires of war and drew Europe toward World War I. Just hours after narrowly escaping an assassin's bomb, Archduke Franz Ferdinand, the heir to Austro-Hungarian throne and his wife, the Duchess of Hohenberg, are killed by Gavrilo Princip. -
Wilson defeated incumbent Republican William Howard Taft and third-party nominee Theodore Roosevelt to easily win the 1912 United States presidential election, becoming the first Southerner to do so since 1848. -
On January 17, 1917 British signals intelligence intercepted and decrypted a coded German telegram from German Foreign Secretary Arthur Zimmermann that was intended for Germany's ambassador to Mexico. -
President Woodrow Wilson declared U.S. neutrality on August 4, 1914, and many Americans saw little reason to entangle themselves in what they viewed as European quarreling and intrigue. -
The First Battle of the Marne succeeded in pushing the Germans back for a distance of 40 to 50 miles and thus saved the capital city of Paris from capture. In this respect it was a great strategic victory, since it enabled the French to renew their confidence and to continue the war. -
On May 7, 1915, the German submarine (U-boat) U-20 torpedoed and sank the Lusitania, a swift-moving British cruise liner traveling from New York to Liverpool, England. Of the 1,959 men, women, and children on board, 1,195 perished, including 123 Americans. -
The first American Expeditionary Forces' (AEF) contingent landed in France in late June 1917 at Saint-Nazaire. The war would soon enter its fourth year with no end in sight. Every French family had been touched by the injury and loss of loved ones, and the austerities of war. -
Battle of Verdun, (February 21–December 18, 1916), World War I engagement in which the French repulsed a major German offensive. It was one of the longest, bloodiest, and most-ferocious battles of the war; French casualties amounted to about 400,000, German ones to about 350,000. -
Sussex Incident, (March 24, 1916), torpedoing of a French cross-Channel passenger steamer, the Sussex, by a German submarine, leaving 80 casualties, including two Americans wounded. The attack prompted a U.S. threat to sever diplomatic relations. -
The Battle of the Somme (1 July - 18 November 1916) was a joint operation between British and French forces intended to achieve a decisive victory over the Germans on the Western Front. For many in Britain, the resulting battle remains the most painful and infamous episode of the First World War. -
The 1916 United States presidential election was the 33rd quadrennial presidential election, held on Tuesday, November 7, 1916. Incumbent Democratic President Woodrow Wilson narrowly defeated former associate justice of the Supreme Court Charles Evans Hughes, the Republican candidate. -
Bethmann Hollweg went before the German Reichstag government and made the announcement that unrestricted submarine warfare would resume the next day, February 1: "The destructive designs of our opponents cannot be expressed more strongly. -
the U.S. Senate voted in support of the measure to declare war on Germany. The House concurred two days later. The United States later declared war on German ally Austria-Hungary on December 7, 1917. -
On May 18, 1917, Congress passed the Selective Service Act, which authorized the Federal Government to temporarily expand the military through conscription. The act eventually required all men between the ages of 21 to 45 to register for military service. -
The Espionage Act of 1917 prohibited obtaining information, recording pictures, or copying descriptions of any information relating to the national defense with intent or reason to believe that the information may be used for the injury of the United States or to the advantage of any foreign nation. -
Wilson's Fourteen Points primarily supported the idea of lasting peace. Many of the points focused on: trade equality, ending of secrete treaties, and alliances, freedom of the seas, and the establishment of the League of Nations -
Despite its name, researchers believe the Spanish flu most likely originated in the United States. One of the first recorded cases was on March 11, 1918, at Fort Riley in Kansas. Overcrowding and unsanitary conditions created a fertile breeding ground for the virus. -
The Bolsheviks signed a peace treaty with Germany on March 3, 1918, formally pulling Russia out of World War I and ceding Poland, Lithuania, the Ukraine, the Baltic provinces, Finland, and other neighboring provinces to the Germans. -
The Sedition Act of 1918 curtailed the free speech rights of U.S. citizens during time of war. Passed on May 16, 1918, as an amendment to Title I of the Espionage Act of 1917, the act provided for further and expanded limitations on speech. -
The Meuse-Argonne Offensive was the largest operation of the American Expeditionary Forces (AEF) in World War I, with over a million American soldiers participating. It was also the deadliest campaign in American history, resulting in over 26,000 soldiers being killed in action (KIA) and over 120,000 total casualties. -
On Nov. 11, 1918, after more than four years of horrific fighting and the loss of millions of lives, the guns on the Western Front fell silent. Although fighting continued elsewhere, the armistice between Germany and the Allies was the first step to ending World War I. -
The Treaty of Versailles was the primary treaty produced by the Paris Peace Conference at the end of World War I. It was signed on June 28, 1919, by the Allied and associated powers and by Germany in the Hall of Mirrors in the Palace of Versailles and went into effect on January 10, 1920