Laguna del Desierto incident 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 as irreconcilable and previous authorization of both governments draw a boundary between the extreme pretensions of the litigants. In the
Laguna del Negro Francisco the lake is formed by alluvial fans and in the eastern sector by alluvial deposits such as gravels, sands and silts. A number of mountains surround the lake, such as the high Copiapó and the Jotabeche. The Astaburuaga River enters the lake on its eastern shore; it originates on the mountains east of Laguna del Negro Francisco where it is nourished by snowmelt. Other tributaries are the Quebrada Azufre in the northwest, Rio de la Sal in the northeast and Rio La Gallina in the southwest; the tributaries of Laguna del Negro Francisco feature wetlands and marsh vegetation has developed