The Treaty of Turkmenchay was signed on February 21, 1828, between the Russian Empire and the Persian Empire, concluding the Russo-Persian War (1826-1828). This treaty marked a significant territorial loss for Persia, granting Russia control over parts of modern-day Armenia and Azerbaijan. It also established the Aras River as the boundary between the two empires. In addition to territorial changes, the treaty included provisions for trade and diplomatic relations. Persia was required to pay a large indemnity to Russia and recognize its influence in the region. The Treaty of Turkmenchay solidified Russian dominance in the South Caucasus and altered the balance of power in the area.