1902 Arbitral award of the Andes between Argentina and Chile

The 1902 Arbitral award of the Andes between Argentina and Chile (Spanish: Laudo limítrofe entre Argentina y Chile de 1902) was a British arbitration in 1902 that established the present-day boundaries between Argentina and Chile. In northern and central Patagonia, the borders were established between the latitudes of 40° and 52° S as an interpretation of the Boundary treaty of 1881 between Chile and Argentina.

Source: Wikipedia — 1902 Arbitral award of the Andes between Argentina and Chile (CC BY-SA 4.0)