an Entity references as follows:
At the end of the Russo-Turkish War during the Congress of Berlin, the Treaty of Berlin was established which in article 25 gave Austria-Hungary the responsibility to occupy and administer the Ottoman provinces of Bosnia and Herzegovina indefinitely while it still stayed under the sovereignty of the Ottoman Empire. A campaign was organized to establish Austro-Hungarian rule in Bosnia and Herzegovina on 29 July 1878 which saw mostly combat against local resistance fighters supported by the Ottoman Empire. The Austro-Hungarian army ultimately reached Sarajevo on 19 August 1878 and prepared to take the city.