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Assassination of Franz Ferdinand
The assassination of Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, and his wife Sophie, Duchess of Hohenberg, occurred on 28 June 1914 in Sarajevo when they were mortally wounded by Gavrilo Princip.
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https://en.wikipedia.org/wiki/Assassination_of_Archduke_Franz_Ferdinand -
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Battle of Tennenberg
The Battle of Tannenberg was fought between Russia and Germany between the 26th and 30th of August 1914, the first month of World War I. The battle resulted in the almost complete destruction of the Russian Second Army and the suicide of its commanding general, Alexander Samsonov.
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https://en.wikipedia.org/wiki/Battle_of_Tannenberg -
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Battle of the Marne
The Battle of the Marne was a World War I battle fought from 6–10 September 1914. It resulted in an Allied victory against the German armies in the west.
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https://en.wikipedia.org/wiki/First_Battle_of_the_Marne -
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Battle of Gallipoli
The Gallipoli Campaign, also known as the Dardanelles Campaign, the Battle of Gallipoli, or the Battle of Çanakkale, was a campaign of the First World War that took place on the Gallipoli peninsula in the Ottoman Empire between 19 February 1915 and 9 January 1916.
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https://en.wikipedia.org/wiki/Gallipoli_Campaign -
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. The ship was identified and torpedoed by the German U-boat U-20 and sank in 18 minutes.
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https://en.wikipedia.org/wiki/Sinking_of_the_RMS_Lusitania -
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Battle of Verdun
The Battle of Verdun, fought from 21 February to 18 December 1916, was the largest and longest battle of the First World War on the Western Front between the German and French armies. The battle took place on the hills north of Verdun-sur-Meuse in north-eastern France.
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https://en.wikipedia.org/wiki/Battle_of_Verdun -
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Battle of the Somme
The Battle of the Somme, also known as the Somme Offensive, was a battle of the First World War fought by the armies of the British Empire and French Empire against the German Empire. It took place between 1 July and 18 November 1916 on both sides of the upper reaches of the River Somme in France.
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https://en.wikipedia.org/wiki/Battle_of_the_Somme -
Interception of the Zimmerman telegram
The Zimmermann Telegram. In January 1917, British cryptographers deciphered a telegram from German Foreign Minister Arthur Zimmermann to the German Minister to Mexico, von Eckhardt, offering United States territory to Mexico in return for joining the German cause.
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https://www.archives.gov/education/lessons/zimmermann -
March Russian Revolution
In the second revolution that October, the Provisional Government was toppled and all power was given to the soviets. The February Revolution (March 1917) was a revolution focused around Petrograd (now Saint Petersburg), the capital of Russia at that time.
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https://en.wikipedia.org/wiki/Russian_Revolution -
US joins WWI
On April 6, 1917, the U.S. joined its allies--Britain, France, and Russia--to fight in World War I. Under the command of Major General John J. Pershing, more than 2 million U.S. soldiers fought on battlefields in France. Many Americans were not in favor of the U.S. entering the war and wanted to remain neutral.
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http://www.americaslibrary.gov/jb/jazz/jb_jazz_wwi_1.html -
November Russian Revolution
On Nov. 7, 1917, Russia's Bolshevik Revolution took place as forces led by Vladimir Ilyich Lenin overthrew the provisional government of Alexander Kerensky. The provisional government came to power after the February Revolution resulted in the Russian monarchy being overthrown in March 1917.
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https://learning.blogs.nytimes.com/2011/11/07/nov-7-1917-russian-government-overthrown-in-bolshevik-revolution/ -
Signing of the Armistice
On Nov. 11, 1918, fighting in World War I came to an end following the signing of an armistice between the Allies and Germany that called for a ceasefire effective at 11 a.m.– it was on the 11th hour of the 11th day of the 11th month.
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https://learning.blogs.nytimes.com/2011/11/11/nov-11-1918-world-war-i-ends/ -
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Signing of the Treaty of Versailles
The Treaty of Versailles was the most important of the peace treaties that brought World War I to an end. The Treaty ended the state of war between Germany and the Allied Powers.
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https://en.wikipedia.org/wiki/Treaty_of_Versailles -
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Creation of the League of Nations
The League of Nations 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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https://en.wikipedia.org/wiki/League_of_Nations -
Creation of the USSR
The Treaty on the Creation of the USSR officially created the Union of Soviet Socialist Republics, commonly known as the Soviet Union. It de jure legalised a union of several Soviet republics that had existed since 1919 and created a new centralised federal government where key functions were centralised in Moscow.
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https://en.wikipedia.org/wiki/Treaty_on_the_Creation_of_the_USSR
