Treaty of Jassy between Russian and Ottoman Empire is signed, ending the Russo-Turkish War of 1787–92.

The Treaty of Jassy, signed at Iași (Jassy) in Moldavia, was a pact between the Russian and Ottoman Empires ending the Russo-Turkish War of 1787–92 and confirming Russia's increasing dominance in the Black Sea.

The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about 22,800,000 km² (8,800,000 sq mi), roughly one-sixth of the world's landmass, making it the third-largest empire in history, behind only the British and Mongol empires. It also colonized Alaska between 1799 and 1867. The empire's 1897 census, the only one it conducted, found a population of 125.6 million with considerable ethnic, linguistic, religious, and socioeconomic diversity.

The Ottoman Empire, also called the Turkish Empire, was an imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Central Europe, between the early 16th and early 18th centuries.

The Russo-Turkish War of 1787–1792 involved an unsuccessful attempt by the Ottoman Empire to regain lands lost to the Russian Empire in the course of the previous Russo-Turkish War (1768–1774). It took place concomitantly with the Austro-Turkish War (1788–1791), the Russo-Swedish War (1788–1790), and the Theatre War.

January 9 is the ninth day of the year in the Gregorian calendar; 356 days remain until the end of the year.