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included preventing wars through collective security and disarmament and settling international disputes through negotiation and arbitration.[2]

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was an intergovernmental organisation founded on 10 January 1920 as a result of the Paris Peace Conference that ended the First World War. It was the first international organisation whose principal mission was to maintain world peace

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First meeting of the league of nations in london

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Involving diplomats from 32 countries and nationalities, the major or main decisions were the creation of the League of Nations

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as the meeting of the victorious Allied Powers following the end of World War I to set the peace terms for the defeated Central Powers

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Treaty of Versailles conference opens

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it was signed, it came into force at 11 a.m. Paris time on 11 November 1918 ("the eleventh hour of the eleventh day of the eleventh month") and marked a victory for the Allies and a complete defeat for Germany, although not formally a surrender

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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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he principles were outlined in a January 8, 1918 speech on war aims and peace terms to the United States Congress by President Woodrow Wilson.

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The Fourteen Points was a statement of principles for peace

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Wilson outlines the 14 points

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the country turned in on itself with a bloody civil war between the Bolsheviks and the conservative White Guard

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Russia  withdrawal from World War One soon after the October Revolution of 1917,

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Russia withdraws from the war

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leftist revolutionaries led by Bolshevik Party leader Vladimir Lenin launched a nearly bloodless coup d'état against the Duma's provisional government

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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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May 1918 over one million American troops were stationed in France,

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By June 1917, only 14,000 American soldiers had arrived in France

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US troops land in france

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United States Declaration of War upon Japan

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After the attack on Pearl Harbor on December 7 th, 1941, the United States Congress declared war upon the Empire of Japan on December 8 th, 1941. The declaration was created and voted upon just one hour after U.S. President, Franklin D. Roosevelt, delivered his now famous "Day of Infamy" speech.

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A declaration of war is a formal declaration issued by a national government indicating that a state of war exists between that nation and another

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Section Eight of the Constitution says "Congress shall have power to ...declare

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US declares war

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In 1917 Russia was convulsed by two major seizures of power. The Tsars of Russia were replaced first in February by a pair of co-existing revolutionary governments, one mainly liberal, one socialist, but after a period of confusion a fringe socialist group lead by Lenin seized power in October and produced the world's first socialist state.

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Russian Revolution of 1917, two revolutions, the first of which, in February (March, New Style), overthrew the imperial government

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By 1917 the bond between the tsar and most of the Russian people had been broken.

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First Russian Revolution

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when Germany declared the area around the British Isles a war zone

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Unrestricted submarine warfare was first introduced in World War I in early 1915

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Germany resumes unrestricted submarine warfare

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World War I. - ppt video online download

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Essential Questions How does MANIA Explain the Causes for World War One?

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that proposed a military alliance between Germany and Mexico

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was a secret diplomatic communication issued from the German Foreign Office in January 1917

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Zimmerman note

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all merchant ships, including those from neutral countries, would be attacked by the German navy

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Unrestricted submarine warfare was first introduced in World War I in early 1915, when Germany declared the area around the British Isles a war zone

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Germany calls off unrestricted submarine (u boat) warfare

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The Sinking of Lusitania at 100: Reports of the Day - USNI News

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The following are two contemporary news reports on the sinking of the Lusitania published in Proceedings in 1915. The first is from the European War Notes section in the May-June 1915 issue. The second is from Professional Notes in the Sept.-Oct. 1915 issue.

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On May 7, 1915, less than a year after World War I erupted across Europe, a German U-boat torpedoed and sank the RMS Lusitania

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On the afternoon of May 7, 1915, the British ocean liner Lusitania is torpedoed without warning by a German submarine off the south coast of Ireland

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The Lusitania is sunk

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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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World War I also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918

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world war I begins

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The assassination led directly to the first world war when Austria-Hungary subsequently issued an ultimatum

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The assassins' motives were consistent with the movement that later became known as young bonsia

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assassination in sarajevo