The ArgentinaâChile border is the longest international border of South America and the third longest in the world after the CanadaâUnited States border and the KazakhstanâRussia border. With a length of 5,308 kilometres (3,298 mi),  it separates Argentina from Chile along the Andes and on the islands of Tierra del Fuego. However, there are some border disputes, particularly around the Southern Patagonian Ice Field.
The northern end of the border is a tripoint it forms with those at the ArgentinaâBolivia border and the Bolivia-Chile border in Atacama desert. It extends south to the Strait of Magellan and ends on Isla Grande de Tierra del Fuego. It separates the island into two to its coast a few kilometers southwest of Ushuaia.
In November 1984 the southern border area was finally established[ clarification needed] after long negotiations and mediation of John Paul II by the Treaty of Peace and Friendship of 1984 between Chile and Argentina, a perpetual treaty, signed at the Vatican by representatives of both countries.
On 16 December 1998, an agreement between Argentina and Chile was signed to set the border line from Mount Fitz Roy and Mount Daudet and finish with the historical dispute. However both countries didn't agree in the section between Mount Fitz Roy and Mount MurallĂłn, and the border is still pending to be defined.
The city of Mendoza, in Argentina, is one of the largest cities located near the border.
- Beagle Conflict, a border dispute between Chile and Argentina over the possession of Picton, Lennox, and Nueva islands and the scope of the maritime jurisdiction associated with those islands that brought the countries to the brink of war in 1978.
- Boundary Treaty of 1881, a treaty signed on July 23, 1881, by Bernardo de Irigoyen and Francisco de Borja EcheverrĂa, which sought to clarify the existing Chile-Argentina border and establish a definite border between the two countries.
- (in Spanish) " Y CronologĂa REFERENCIAS GENERAL SOBRE LOS Acuerdos Y Tratados bordering SUSCRITOS POR ARGENTINA Y CHILE (1820-1998) '" on the site soberaniachile.cl '
- (in French) The Argentine-Chilean border '" on the site' 'persee.fr'