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Franz Ferdinand was assassinated starting world war one.

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planes were first used in World war one. It was first used in the battle of Mons. The battle ended with Germany winning the battle.

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first trenches of world war one. The trenches were build on the western front.

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First time gas was used in world war 1.asphyxiating gas was the first gas used in the war. It was first used by the Germans to weaken the allies trench. The gas was a mix of carbon and oxygen. the effects were rapid breathing, rapid heart rate,clumsiness , and fatigue.

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U boat blockade of Britain. The plan was to starve Britain out of the war by preventing trade in Britain with submarines to sink ships that tried to trade with Britain.

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The battle of Somme started on July 1, 1916 and ended on November 18, 1916. It was the worst battle of world war one. It ended with 1 million casualties and 300,000 deaths. Britain suffered 420,000 casualties. France suffered 200,000 casualties. Germany suffered 500,000 casualties.

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First time tanks were used in war. It was British Mark 1 tank. The tank was first used in the battle of Somme.

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on January 9,1917 Germany try to send a message to mexico to join there alliance and that mexico can take land from the United states if they joined a alliance with Germany. The note was intercepted by Britain who then told the United states what happen. Causing the United states to join world war one.

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on January 8,1918 President gave his 14 points speech. They were open diplomacy, freedom of the seas,removal of economic barriers,reduction of armaments, adjustment of colonial claims,conquered territories in russia, preservation of belgian sovereignty, restortion of french territory,redrawing of italian frontiers,division of Austria-Hungary, redrawing of balkan boundries, limitainon on turkey, establishment of independent poland, creation of assosiation of nations.

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June 1919, treaty of Versailles was signed ending world war one. It only punished Germany for the war.