The Treaty of Kutschuk Kainardzhi was signed on July 21, 1774, in Küçük Kaynarca, Dobruja (today Kaynardzha, Silistra Province, Bulgaria) between the Russian Empire (represented by Field-Marshal Rumyantsev) and the Ottoman Empire after the Ottoman Empire was defeated in the Russo-Turkish War of 1768-1774.
The treaty was by far the most humiliating blow to the once-mighty Ottoman realm. The Ottomans ceded the part of the Yedisan region between the Dnieper and Southern Bug rivers to Russia. This territory included the port of Kherson and gave the Russian Empire its first direct access to the Black Sea. The treaty also gave Russia the Crimean ports of Kerch and Enikale and the Kabarda region in the Caucasus.
The most significant aspect of this treaty to naval history is that it gave Russia access to warm water ports and passage through the Dardanelles.