Congress of Berlin
The Congress of Berlin, held in the summer of 1878, was a meeting of the major European powers that revised the peace settlement ending the Russo-Turkish War. Hosted by the German chancellor Otto von Bismarck, who presented himself as an "honest broker," it redrew the map of the Balkans, confirmed the independence of Serbia, Montenegro and Romania, and reshaped the balance of power in Europe. Its decisions left many grievances unresolved, and the region's instability remained a concern for decades.
The background lay in the long decline of Ottoman power in southeastern Europe. Uprisings in Bosnia and Herzegovina in 1875 and in Bulgaria in 1876 were met with harsh repression, which provoked outrage in Europe. Russia, presenting itself as protector of Orthodox Slavs, declared war on the Ottoman Empire in 1877 and advanced close to Constantinople. In March 1878 the Treaty of San Stefano forced the Ottomans to accept a very large autonomous Bulgaria, which would have extended Russian influence deep into the Balkans and reached the Aegean.
Britain and Austria-Hungary viewed this outcome as unacceptable. Britain worried about the route to India and the Straits, while Austria-Hungary feared a strong Slavic state on its southern flank. Threats of further conflict led to the congress, which opened in Berlin in June 1878 and lasted about a month. Delegates included Bismarck, Britain's Benjamin Disraeli, Russia's Alexander Gorchakov, and Austria-Hungary's Gyula Andrássy, along with Ottoman representatives. Smaller Balkan states were largely excluded from decision-making.
The settlement cut the large Bulgaria down. A smaller principality of Bulgaria was created in the north, under nominal Ottoman suzerainty, while a southern region, Eastern Rumelia, received limited autonomy under the sultan. Serbia, Montenegro and Romania were recognized as fully independent, with some territorial changes. Austria-Hungary received the right to occupy and administer Bosnia and Herzegovina, though the provinces remained formally Ottoman. Britain took control of Cyprus, and Russia kept some territory in the Caucasus and, for Romania's cost, southern Bessarabia, with Romania compensated by Dobruja.
The congress is often credited with averting a wider war in the short term, but its legacy is mixed. Many Balkan peoples felt their national aspirations had been sacrificed to great-power interests. Russia resented what it saw as diplomatic defeat, which strained its relations with Germany and Austria-Hungary. The Austro-Hungarian presence in Bosnia fed tensions that eventually contributed to the crisis of 1914. Historians debate how directly Berlin led to later conflicts, but it remains a landmark in the story of Balkan nation-building and European diplomacy.