🇦🇷 Boundary treaty of 1881 between Chile and Argentina

The Boundary Treaty of 1881 between Chile and Argentina established a border between the two countries, resolving a long-standing dispute over the Patagonia region. The treaty defined the border along the 45th parallel south, with Argentina gaining control of the Chubut River valley and Chile gaining control of the Santa Cruz River valley. This treaty marked a significant milestone in the peaceful resolution of border disputes between the two nations.