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One week later, the U.N. Security Council met for the first time and established its rules of procedure.

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The first General Assembly of the United Nations, comprising 51 nations, convenes at Westminster Central Hall in London, England.

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Treaty of Versailles, peace document signed at the end of World War I by the Allied and associated powers and by Germany in the Hall of Mirrors in the Palace ofVersailles, France, on June 28, 1919; it took force on January 10, 1920.

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Negotiations at the Paris Peace Conference were complicated. The United Kingdom, France, and Italy fought together as the Allied Powers during the First World War.

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the cessation of hostilities, the withdrawal of German forces to behind the Rhine, Allied occupation of the Rhineland and bridgeheads further east, the preservation of infrastructure, the surrender of aircraft, warships, and military matériel, the release of Allied prisoners of war and interned civilians, and eventual reparations

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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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Armistice signed

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The Fourteen Points speech was made to a joint session of the US Congress on January 8, 1918.

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The Fourteen Points speech was a statement given to Congress on January 8, 1918 by President Woodrow Wilson declaring that WW1 was being fought for a moral cause and calling for peace in Europe.

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Wilson outlines the 14 points

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In December1917, Germany agreed to an armistice and peace talks with Russia, and Lenin sent Leon Trotsky to Brest-Litovsk in Belarus to negotiate a treaty.

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Russia signalled her withdrawal from World War One soon after the October Revolution of 1917, and the country turned in on itself with a bloody civil warbetween the Bolsheviks and the conservative White Guard.

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Russia withdraws from the war

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Julian calendar at the time, so period references show a 25 October date).

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On 7 November 1917,Bolshevik leader Vladimir Lenin led his leftist revolutionaries in a revolt against the ineffective Provisional Government

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October Revolution occurs in Russia

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The Meuse-Argonne Offensive, also known as the Maas-Argonne Offensive and theBattle of the Argonne Forest, was a major part of the final Allied offensive of World War I that stretched along the entire Western Front.

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During World War I, the first 14,000 U.S. infantry troops land in France at the port of Saint Nazaire.

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US troops land in France

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No immediate military or economic impact on the war because the Allies had already relied on American industry to provide them with resources for the war. 2.

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President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany.

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US declares war

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involved the collapse of an empire under Tsar Nicholas II and the rise of Marxian socialism under Lenin and his Bolsheviks. It sparked the beginning of a new era in Russia that had effects on countries around the world.

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Demonstrators clamoring for bread took to the streets of Petrograd. ... They opposed violent social revolution.

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First Russian Revolution

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Unrestricted submarine warfare is a type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules

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first introduced in World War I in early 1915, when Germany declared the area around the British Isles a war zone, in which all merchant ships, including those from neutral countries, would be attacked by the German navy.

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Germany resumes unrestricted submarine warfare

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It proposed to have Mexico enter the war against the US, on the side of Germany.

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A note was intercepted from Germany to Mexico by the US. The note was about Germany and Mexico wanting to start an alliance towards the US

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Zimmerman Note

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Boats and boating--Equipment and supplies

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He believed that the sinking of a few neutral merchant ships at the start of a campaign of unrestricted submarine warfare would be enough to scare off most ships from trading with Britain.

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Germany declared the area around the British Isles a war zone, in which all merchant ships, including those from neutral countries, would be attacked by the German navy.

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Germany calls off unrestricted submarine warfare.

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The ship was identified and torpedoed by the German U-boat U-20 and sank in 18 minutes.

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The Lusitania was sunk by the Germans, 128 Americans were killed. this was strike 1 of the World War.

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The Lusitania

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Empires were destroyed, millions were killed and the world was upended in a war meant to end all others.

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The immediate cause for World War 1 was the assassination of the Archduke Franz Ferdinand of Austria and his pregnant wife Sophie. Before WW1 was triggered, a number of defense alliances existed between the major European countries.

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World War 1 begins

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The killings sparked a chain of events that led to the outbreak of World War I by early August.

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Arch Duke Franz Ferdinand was assassinated in Sarajevo

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Assassination in Sarajevo