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On June 28, Archduke Franz Ferdinand was assassinated by Princip, a member of the Black Hand.
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On 6 July, Germany gave a blank cheque to Austria- Hungary to show its unconditional support to Austria- Hungary.
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On July 23, Austria blamed Serbia for the death of Franz Ferdinand and sen it an ultimatum.
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On 28 July, Austria declared war on Serbia and shelled its capital, Belgrade.
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On 29 July, the Russian army gt ready to help Serbia defend itself against the Austrian attack. Germany warned Russia not to help the Serbs.
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On 1 August, Germany declared war on Russia. It also began to move its army towards France and Belgium
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On 2 August, the French army was put on war footing ready to fight any German invasion.
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On 3 August, Germany declared war on France and invaded Belgium. Britain ordered Germany to withdraw from Belgium.
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On 4 August, with the Germans still in Belgium, Britain declared war on Germany.
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On 6 August, Austria declared war on Russia.
