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Archduke Franz Ferdinand of Austria-hungary was assassinated by Gabrielle Princip of Serbia
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timeline of World War I, from where Archduke Franz Ferdinand was assassinated to where Greece joined the war.
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one month after the assassination of franz ferdinand, austria-hungary declared war on serbia
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serbia enters the war after austria-hungary declares war on it
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Germany declares war on russia after russia comes to aid it's ally Serbia
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France enters the war to aid russia in stopping germany and to fight back germany's invasion
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Germany Offically Declares war on Russia as a result of germany being Austria-hungary's ally
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Great Britain enters World War I due to Germany's invasion of Belgium
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In order for Germany's troops reach France they had to invade Belgium
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The Ottoman Empire enters WWI with the Central Powers
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Italy enters WWI on the side of the allies
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The Kingdom of Bulgaria joins the central powers after their request for aid in recovery after the bulkin war was accepted by the central powers
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germany declares war on portugal after portugal declares war on them because of germany's U-boats blocking trade between portugal and great britain
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Romania enters world war I to aid it's ally, Russia, in fighting Germany
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Greece declares war on the central powers
