The Herzegovina Uprising against Ottoman rule begins, which would last until 1878 and have far-reaching implications throughout the Balkans.
The Herzegovina uprising (Serbian: Херцеговачки устанак, romanized: Hercegovački ustanak) was an uprising led by Christian Serb population, against the Ottoman Empire, firstly and predominantly in Herzegovina (hence its name), from where it spread into Bosnia and Raška. It broke out in the summer of 1875, and lasted in some regions up to the beginning of 1878. It was followed by the Bulgarian Uprising of 1876, and coincided with Serbian-Turkish wars (1876–1878), all of those events being part of the Great Eastern Crisis (1875–1878).The uprising was precipitated by the harsh treatment under the beys and aghas of the Ottoman province (vilayet) of Bosnia — the reforms announced by the Ottoman Sultan Abdülmecid I, involving new rights for Christian subjects, a new basis for army conscription, and an end to the much-hated system of tax-farming, were either resisted or ignored by the powerful Bosnian landowners. They frequently resorted to more repressive measures against their Christian subjects. The tax burden on Christian peasants constantly increased.
The rebels were aided with weapons and volunteers from the principalities of Montenegro and Serbia, whose governments eventually jointly declared war on the Ottomans on 18 June 1876, leading to the Serbian-Ottoman War (1876–78) and Montenegrin–Ottoman War (1876–78), which in turn led to the Russo-Turkish War (1877–78) and Great Eastern Crisis. A result of the uprisings and wars was the Berlin Congress in 1878, which gave Montenegro and Serbia independence and more territory, while Austro-Hungary occupied Bosnia and Herzegovina for 30 years, although it remained de jure Ottoman territory.