Laguna del Desierto incident violence in order to obtain control of the zone and political preponderance of the force. American historian William Sater states: Laguna del Desierto incident The Laguna del Desierto incident, in Argentina called also Battle of Laguna del Desierto, occurred between four Chilean Carabineros and between 40 and 90 members of the Argentine Gendarmerie and took place in zone south of O'Higgins/San Martín Lake on 6 November 1965, resulting in one lieutenant killed and a sergeant injured, both members of Carabineros, creating a tense atmosphere between Chile and Argentina. The British award of 1903 considered the demands of Chile and Argentina
Laguna del Negro Francisco Laguna del Negro Francisco lies northeast of the city of Copiapó in the Atacama Region of Chile, and can be reached by south-bound roads that diverge from the Copiapó-Tinogasta road close to the Salar de Maricunga. A National Forest Corporation building is close to the southwestern shore of the lake. The area has been called a "scenic beauty". The lake lies at an elevation of , is wide and has a surface area of , but a depth of only about ; the Ministry of Public Works estimated a mean depth of in 1941. The water surface can fluctuate between