Plans for the start of the World War I existed 13 months before Sarajevo assassination and 14 months before the Austro-Hungarian declaration of war on Serbia, according to so far hidden letter, which was presented today in Andricgrad by the Director of the Archives of Serbia, Miroslav Perisic.

This letter was sent by the Governor of Bosnia and Herzegovina Oskar Potiorek to the Minister of the Austro-Hungarian monarchy Biliński on May 28 1913, and a copy was presented today in the Department of the History of Kamengrad.

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