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Assassination of Archduke Franz Ferdinand
The leader was Gavrilo Princip, a member of the Black Hand secret society. The political reason for the assassination was to break off Austria-Hungary's South Slav provinces so they could be combined into a new country, Yugoslavia. This soon led to the outbreak of war in Europe at the end of July 1914. -
Trench Warfare, poison gas, and machine guns
soldiers fought from dug out trenches with machine guns and poison gas. This caused a lot of casualties. -
Sinking of the Lusitania
The sinking of the Cunard ocean liner RMS Lusitania occurred on Friday, 7 May 1915 during the First World War, as Germany waged submarine warfare against the United Kingdom which had implemented a naval blockade of Germany. -
Zimmerman Telegraph
The Zimmerman Telegram, or Note, was significant to the history of World War I because it forced United States President Woodrow Wilson to reverse his initial position on American involvement in the European conflict and commit the United States to the war against Germany. -
Russian Revolution
The Russian Revolution of 1917 was one of the most explosive political events of the twentieth century. The violent revolution marked the end of the Romanov dynasty and centuries of Russian Imperial rule. -
U.S entry into WWI
The United States entered the war because of the Germans' decision to resume the policy of unrestricted submarine warfare, and the Zimmerman telegram, intercepted by the British, in which Germany floated the idea of an alliance with Mexico. -
Battle of Argonne Forest
The Battle of Argonne Forest was part of what became known as the Meuse-Argonne Offensive, the last battle of World War I . It was a massive attack along the whole line, with the immediate goal of reaching the railroad junction as Sedan. The US had over 1 million troops now available to fight. -
Woodrow Wilson's Fourteen Points
The Fourteen Points speech of President Woodrow Wilson was an address delivered before a joint meeting of Congress on January 8, 1918, during which Wilson outlined his vision for a stable, long-lasting peace in Europe, the Americas and the rest of the world following World War I. -
Armistice
Armistice definition, a temporary suspension of hostilities by agreement of the warring parties; truce: World War I ended with the armistice of 1918. -
Treaty of Versailles
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.
