The Congress of Berlin was a diplomatic meeting held in 1878, aimed at resolving territorial disputes in the Balkans following the Russo-Turkish War. Major European powers, including Germany, Austria-Hungary, Britain, France, Italy, and Russia, participated to negotiate the future of the Ottoman Empire's European territories. The congress resulted in significant changes to the map of Europe, with the creation of new states like Romania, Serbia, and Montenegro. It also aimed to balance power among the nations and prevent further conflicts in the region, although it ultimately set the stage for future tensions leading to World War I.