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This was where trench warfare was introduced as well as chemical warfare.
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This event kickstarted the war.
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This is the start of the actual war.
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This was another war adding to the fact that this was in fact a WORLD WAR.
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This was known as the start of World War 1.
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Germany defeated Russia when Russia was on its way to attack Germany.
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Germany declared Great Britain to be a war zone. They blockaded the water with submarines, threatening to kill anyone who came in.
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German U-Boat sunk British ship catching many allies attention, including the US.
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This battle was the bloodiest as well as the longest battle of World War 1.
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Tanks were first introduced during the Battle of the Somme. This technology changed the idea of wars completely.
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Germany sent a telegram to Mexico asking them to join the war but the telegram was intercepted by Britain and deciphered.
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This is important because this basically ended Germany's hopes of winning.
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Woodrow Wilson addressed his Fourteen Points to Peace.
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This ended the fighting.
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This ended World War 1 OFFICIALLY.