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The Balkan states of Bosnia and Herzegovina, had been annexed from Turkey and taken into the Austro-Hungarian Empire. This was strongly resented by many Serbs and Croats and a nationalist group, The Black Hand, was formed.
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The Battle of Verdun was the longest battle of World War I and was one of the bloodiest.
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During the Battle of the Somme, tanks are first introduced into battle.
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Telegram is sent to Mexico in an effort to entice Mexico to join the war. The British intercept and decipher the coded message.
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The first turning point
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(also known as the Third Battle of Ypres)
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It is a peace treaty between Russia and the Central Powers.
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more commonly known as the Red Baron.
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