evidence: Del Desierto Lake or Lake of the Desert (called Lago del Desierto in Argentina and Laguna del Desierto in Chile) is a natural lake located in the Lago Argentino Department, Santa Cruz Province, Argentina. Located near Monte Fitz Roy and the O'Higgins/San Martín Lake, Lago del Desierto was for many decades the subject of a territorial dispute between Argentina and Chile, escalating to a small firefight on 6 November 1965 when 40 to 90 members of the Argentine Gendarmerie fought against four Chilean Carabineros, of which a lieutenant was killed and a sergeant was injured. The dispute was resolved favourably for Argentina in 1994 by international arbitration.[1][2] [...] Dispute [edit]After settlement, the area between landmark 62 on the southern shore of Lake O'Higgins/San Martín and Mount Fitz Roy, where Lago del Desierto is located, quickly became the subject of a border conflict between Chile and Argentina due to poor geographic information about the area when the 1881 Treaty was signed between Argentina and Chile. [...] - ^ a b René Peri Fagerström (1994). A la sombra del Monte Fitz Roy. Salón Teniente Merino.