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The Battle of Tannenberg August 26 - 30, 1914

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The Battle of Tannenberg August 26 - 30, 1914

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In the West, Germany invaded Belgium, and the United Kingdom declared war in response.  By the end of August, German troops had advanced deep into France and were threatening Paris.

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First Battle of the Marne September 6 - 12, 1914

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First Battle of the Marne September 6 - 12, 1914

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French and British troops stopped the German advance that had threatened to take over France. This battle, in which both sides were locked in their trenches, led to a stalemate, with neither side gaining or losing much ground.

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Gallipoli Campaign February 1915 - January 1916

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Gallipoli Campaign February 1915 - January 1916

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British and French troops led this operation against Turkey to relieve pressure on the Russians. The United Kingdom lost more than 200,000 soldiers, including many recruits from British colonies such as India, Australia, and New Zealand.

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Germany initially led a strong attack, which forced the British to retreat. Eventually, the British managed to surround German ships and both sides retreated after a desperate torpedo attack from the Germans.

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The terrain on this battlefield in northern France sloped downward, making tanks particularly effective at tearing through defenses. Germany used many large formations of these aircraft during the Battle of Cambrai, resulting in losses of many British troops.