Undoubtedly, the Russian Empire and the Soviet Union played an important role in modern Balkan history. In international politics, the treaty of Kuchuk Kainardji (1774) is considered as one of the most significant points for Russian advancement into the Balkans. This article outlines the significance of this treaty by analysing its background and stipulations.After the Ottoman Empire lost its predominance over the West European countries and Russia at the end of the seventeenth century, the Ottoman Empire, Russia, the Habsburg Empire and the newly emerging Prussia coexisted in the first half of the following century and these four countries gradually strengthened their ties. In this situation, Russia attempted to expand its influence into the Balkans. However, at that time the Ottoman control over the Balkans was still so firm that such attempts were unsuccessful.This situation, however, changed when the Russo-Ottoman war broke out in 1768. In this war, the Russian troops defeated the Ottoman troops at most fronts including Greece and the Danubian principalities. As Russia's victory continued, the orthodox subjects in the Balkans began to expect Russian protection. Consequently, the Habsburg Empire and Prussia sensed an impending crisis due to the expansion of the Russian influence into the Balkans, and they began to intervene in this war as mediators. In the peace negotiations, although Russia occupied most of the territory of Wallachia and Moldavia, it was obliged to return both countries to the Ottoman Empire because of immense pressure from both the mediators. Nevertheless, Russia attempted to maintain its influence on the Danubian principalities and to obtain some clues for its advancement into the Balkans in the future. In 1774, Russia and the Ottoman Empire signed a peace agreement at Kuchuk Kainardji.Then, we analyse the contents of this treaty. We consider that there were three articles that enabled Russian advancement into the Balkans. Firstly, Article 16 stipulates Ottoman protection for the local subjects in Wallachia and Moldavia and in this article Russia obtained a voice concerning the affairs of both principalities. This right allowed Russia to officially involve itself in the issues pertaining to the Danubian principalities, and these two countries provided the base for Russia's further advancement into the Balkans. Secondly, some researchers have conjectured that owing to this treaty, Russia obtained the right to protect the orthodox Christian subjects in the Ottoman Empire; however, this is not true. Article 7 states that the orthodox Christian subjects in the Ottoman Empire must be protected by the Porte and not by Russia. The above-mentioned misunderstanding was caused due to Russia's exaggerated insistence on the eve of the Crimean War that in this treaty, it had obtained the right to protect the orthodox Ottoman subjects. However, it is true that this treaty was indirectly the beginning for Russia's insistence. Thirdly, Article 11, which stipulates the activities of merchants, provides Russia the right to open consulates anywhere within the territory of the Ottoman Empire. Using this right, Russia opened consulates and vice-consulates in the Danubian principalities in the 1780s, followed by those in the other Balkan areas in the nineteenth century. These consulates played an important role in Russian advancement into the Balkans by collecting information, maintaining contact with local leaders, ecclesiastics and other local influential men.Thus, this treaty was of great significance for Russian advancement into the Balkans.