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On 1878, Austria Hungary had invaded Bosnia, three decades later(1908), they cause a crisis in Bosnia, named the Bosnian Crisis. It made Services a and Bosnia start to dislike Austria Hungary, because both were going to creat one country.
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The Tripel Alliance was made for when one of the three countries got in war, they could be backed up. It consisted of Germany, Austria-Hungary and Italy
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Teh Tripel Entente was made for the same resson the Tripel Alliances was created. It consited at the start of Britan, Russia and France.
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The Unification of Death or more commonly known as The Black Hand, was created by Captain Dragutin Dimitrijević "Apis", to stop the control of Austria Hungary in Bosnia.
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The Black Hand a Serbian terrorist group, had sent a group of 7 to kill the Archduke Franz Ferdinand, they met in a bakery where they passed weapons to each other, the first attempt was done with a grenade, it had failed he attempts to comit suicide but as well, he fails and is arrested, the Archduke goes the mayor and tells him of the event, Gabrilo Princip goes to eat something, the convoy takes a wrong turn and Gabrilo fires at the car killing the Archduke and his wife.
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The assaination of the Archduke made nations raly up there ally's and soldiers because war had stared.
