The Treaty of Riga was signed on March 18, 1921, between the Second Polish Republic and the Soviet Russia. This agreement ended the Polish-Soviet War (1919-1921) and established the borders between the two nations. It granted significant territories to Poland, including parts of present-day Lithuania, Latvia, and Belarus. The treaty aimed to stabilize the region after years of conflict and was part of a broader effort to establish peace in Eastern Europe. It also recognized the independence of the Baltic States, contributing to the geopolitical landscape of the interwar period.