Treaty of Arbitration between Chile and Argentina of 1902
Encyclopedia
The Cordillera of the Andes Boundary Case 1902 (Argentina, Chile), was a British arbitration that established the present day boundaries between Argentina
Argentina
Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

 and Chile
Chile
Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

 in Patagonia
Patagonia
Patagonia is a region located in Argentina and Chile, integrating the southernmost section of the Andes mountains to the southwest towards the Pacific ocean and from the east of the cordillera to the valleys it follows south through Colorado River towards Carmen de Patagones in the Atlantic Ocean...

 between the latitudes of 40° and 52° S as a interpretation of the Boundary treaty of 1881 between Chile and Argentina. As result of the arbitration many Patagonian lakes became divided in one Chilean and one Argentine side. The boundary agreed on the treaty was a compromise between the Chilean and Argentine boundary thesis that was established by the British king who acted as arbiter.

The text of the arbitration is stored in the United Nations
United Nations
The United Nations is an international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and achievement of world peace...

: The Cordillera of the Andes Boundary Case (Argentina, Chile).

Background

  • Pactos de Mayo
    Pactos de Mayo
    The Pactos de Mayo are four protocols signed in Santiago de Chile by Chile and Argentina on 28 May 1902 in order to extend their relations and resolve its territorial disputes. The disputes had led both countries to increase their military budgets and run an arms race in the 1890s.1. - Acta...

  • Boundary treaty of 1881 between Chile and Argentina
  • Uti possidetis
    Uti possidetis
    Uti possidetis is a principle in international law that territory and other property remains with its possessor at the end of a conflict, unless otherwise provided for by treaty; if such a treaty doesn't include conditions regarding the possession of property and territory taken during the war,...

  • Divortium aquorum

Boundary

In some areas such as Aysén Region
Aysen Region
The XI Aisén Region of General Carlos Ibáñez del Campo , also spelled Aysén, is one of Chile's 15 first order administrative divisions. Although the third largest in area, the region is Chile's most sparsely populated region with a population of 105,000. The capital of the region is Coihaique, the...

the Chilean claims were partly agreed giving Chile foothold on the lakes and plains east of the Andes, while in some other areas the Argentine thesis of the Snowy Cordillera as boundary prevailed.
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