Lomas the lomas owe their existence to the moist dense fog and mist which rolls in from the Pacific. The fog is called garúa in Peru and Camanchaca in Chile. According to the Köppen Climate Classification system, the coastal desert of Peru and the Atacama desert of Chile feature a rare desert climate, that is abbreviated "Bwn" on climate maps with the n denoting frequent fog. Temperatures are mild year round and precipitation is nearly non-existent, averaging to per year in most locations. Many years have no precipitation at all. The Atacama Desert of Chile is commonly known as the driest
War of the Pacific in the Andes. For the first five months the war played out in a naval campaign, as Chile struggled to establish a sea-based resupply corridor for its forces in the world’s driest desert. In February 1878, Bolivia imposed a new tax on a Chilean mining company (“Compañía de Salitres y Ferrocarril de Antofagasta”, CSFA) despite Bolivian express warranty in the 1874 Boundary Treaty that it would not increase taxes on Chilean persons or industries for 25 years. Chile protested and solicited to submit it to mediation, but Bolivia refused and considered it a subject of Bolivia’s courts. Chile insisted and