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Arch Duke Franz Ferdinand was assassinated by Bosnian Nationalists
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Austria Hungary made demands to Serbia hoping they would refuse so they could invade their land
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Serbia gave in on 9 out of 10 demands and mobilised their army
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Austria Hungary declared war against Serbia and called on Germany to help
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Russia started to mobilise their army
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Austria Hungary mobilised against Serbia. Germany wanted Russia to demobilise but they said no
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Germany declared war and mobilised against Russia while starting to think about the Schlieffen plan. France mobilised troops against Germany
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Germany moved through Luxenbourg
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Germany declared war on France
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Germany officially invaded Belgium. Britain declared war on Germany