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Germany gained a lot of territory in Belgium and France but…During the Battle of the Marne in September 1914, the Germans were pushed back by Allied forces.

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Germany gained a lot of territory in Belgium and France but…During the Battle of the Marne in September 1914, the Germans were pushed back by Allied forces.

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They "dug in" to avoid losing any more ground.The Allies were unable to break through this line of defense, and also began to dig protective trenches.

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They "dug in" to avoid losing any more ground.The Allies were unable to break through this line of defense, and also began to dig protective trenches.

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What began as a temporary strategy evolved into one of the main features of the war at the Western Front 

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What began as a temporary strategy evolved into one of the main features of the war at the Western Front 

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By late 1914, the ‘war of movement’ was replaced by a ‘war of entrenchment’, when opposing armies dug defensive positions called trenches and settled down to a long fight. 

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By late 1914, the ‘war of movement’ was replaced by a ‘war of entrenchment’, when opposing armies dug defensive positions called trenches and settled down to a long fight. 

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The nature of war had changed forever. With some exceptions, the dashing cavalry played no role in these conditions.

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The nature of war had changed forever. With some exceptions, the dashing cavalry played no role in these conditions.

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The powers used as many existing and new weapons as possible; this was called a War of Attrition. The landscape of death, shown here by a modern artist, was often referred to as ‘Hell on Earth’.

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The powers used as many existing and new weapons as possible; this was called a War of Attrition. The landscape of death, shown here by a modern artist, was often referred to as ‘Hell on Earth’.

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World War I became a war of attrition, a conflict in which neither side could win a decisive victory to end the war. This forced both sides to try to wear down their enemy by killing as many soldiers as possible.

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World War I became a war of attrition, a conflict in which neither side could win a decisive victory to end the war. This forced both sides to try to wear down their enemy by killing as many soldiers as possible.

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Heavy artillery had existed for centuries, but in 1914–18 it was developed to maximum destructive power. It was used to overcome the problems of static trench warfare. Some 75 per cent of deaths and injuries in World War I were caused by cannon shells.

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Heavy artillery had existed for centuries, but in 1914–18 it was developed to maximum destructive power. It was used to overcome the problems of static trench warfare. Some 75 per cent of deaths and injuries in World War I were caused by cannon shells.

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World War I expanded from one major site (the Western Front in Belgium and northern France) to several locations of war.

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World War I expanded from one major site (the Western Front in Belgium and northern France) to several locations of war.

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The Allies attacked Germany’s ally, Turkey creating the Dardanelles Front, (Gallipoli was just one part). The aim was to capture the city of Constantinople (Istanbul) to allow the Allies to transport supplies to Russia.

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The Allies attacked Germany’s ally, Turkey creating the Dardanelles Front, (Gallipoli was just one part). The aim was to capture the city of Constantinople (Istanbul) to allow the Allies to transport supplies to Russia.

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Italy sided with the Allies in May 1915, and its armies attacked the Austro-Hungarian Empire to the north, the Italians defeated Austria’s forces.Russia also sided with the Allies, and attacked Germany, forming the Eastern Front. 

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Italy sided with the Allies in May 1915, and its armies attacked the Austro-Hungarian Empire to the north, the Italians defeated Austria’s forces.Russia also sided with the Allies, and attacked Germany, forming the Eastern Front. 

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Exploding shells - Exploding shells also sent out showers of shrapnel (flying pieces of sharp metal) that could cut off half a man’s face.

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Exploding shells - Exploding shells also sent out showers of shrapnel (flying pieces of sharp metal) that could cut off half a man’s face.

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The machine gun - By the end of the war, they had been developed to the point they could spit out 1000 bullets per minute, which effectively meant that they could determine the outcome of a battle.

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The machine gun - By the end of the war, they had been developed to the point they could spit out 1000 bullets per minute, which effectively meant that they could determine the outcome of a battle.

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Armoured tank - The tank was an armoured vehicle that could advance across no man’s land in the face of machine-gun fire. Inventors believed that this mighty weapon might solve the problem of trench warfare and mass slaughters.

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Armoured tank - The tank was an armoured vehicle that could advance across no man’s land in the face of machine-gun fire. Inventors believed that this mighty weapon might solve the problem of trench warfare and mass slaughters.