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Events on Thursday 13 June 1878 1
1878Congress of BerlinGreat powers redraw the map of the BalkansConvened by Otto von Bismarck, the congress revised the Treaty of San Stefano and reduced the size of the new Bulgarian state. It confirmed the independence of Serbia, Montenegro, and Romania, and placed Bosnia and Herzegovina under Austro-Hungarian administration. The settlement reshaped the Balkans for decades and set the stage for later regional conflicts.