Treaty of San Stefano, a preliminary peace treaty signed in the San Stefano suburb of Constantinople on February 19, 1878, ending the Russian-Turkish War of 1877-1878. It was of great importance in the liberation of the Balkan peoples from the Turkish yoke and in the field of international diplomacy on the Armenian issue. The provisions of the Treaty of San Stefano were revised in a document adopted as a result of the Berlin Congress.

It was signed on February 19 (March 3) in San Stefano (near Constantinople).

The Treaty of San Stefano guaranteed the fulfillment of the obligations undertaken by Turkey, that is. “Immediately implement improvements based on local needs of the Armenian-populated regions”

Under the Treaty of San Stefano, Montenegro, Serbia and Romania were recognized as independent. Bosnia and Herzegovina gained autonomy within the Ottoman Empire. Bulgaria (with Eastern Romania, Macedonia, part of Thrace, as far as Thessaloniki, the Aegean Sea) was declared an autonomous power with the consent of the powers and the  power established by the High Gate. The Turkish troops were withdrawn from Bulgaria, and the Russian troops remained there for 2 years.

Russia received the Southern Bessarabia, which was separated from it by the Treaty of Paris in 1856, and Ardahan, Kars, Batumi, Bayazet, in Asia and the territory up to Soghanlugh.

A special article (Article 16) planned administrative reforms in Western Armenia. The successful course of the war for Russia and the occupation of a part of Western Armenia by the Russian troops inspired liberation hopes in the Armenian political circles as well.

For the first time in modern history, the name Armenia was mentioned by Armenians in an international treaty. According to Article 19 of the treaty, Kars, Ardahan, Bayazet, Batumi, Oltin, Artanuj, Ardvin, Alashkert, Kaghzvan and Khumar passed to Russia.