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-Tsar Nicholas II (1868 – 1918) The last Russian Emperor. As head of state, Tsar Nicholas II approved Russia’s entry into the First World War.

V.Lenin was a leader of Russian Revolution in 1917. With Germany's help, Lenin was smuggled into Russia where he successfully led the Russian revolution.

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-During the WWI, the trench warefare reached its highest development.
-The trenches arose within the first couple of months of WWI.
-A typical trench system dealt with a series of two or more trench lines.
-Opposing armies would try to break through the enemy's trench systems.

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-Trench warefare, wars in which opposing armed forces attack and defend from sets of trenches dug into the ground.
-The opposing team also has trenches near one another.
-Trench warefare is a type of combat that was used by opposing troops facing eachother.

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British troops in a trench on the Western Front during World War I.

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The trench warefare was used for occuping fights.

Trench warfare becomes necessary when two armies face a stalemate, with neither side able to advance and overtake the other.

The first major trench lines were completed in November 1914

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The first warefare trench used during world war one was located in the western front, France. By the end of the war both sides had built serval of them from the North Sea to belguim and france. They were usally the the battlefields of many fights the countries fought.

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Trench warfares were very important during World War 1 becuase they protected many soldiers from the enemies bullets and artilury. They wer usally very dirty and the soilders spent most of their time there.