IIquique is located 1787 km from Santiago and 310 km from the city of Arica. The use of nitrate in the 1830s makes it an important location for the trade in the product. Iquique is the site of many battles during the War of the Pacific between Chile, Bolivia and Peru. In the context of the naval blockade of the port, with among others the naval battle of Iquique. The economic activity of Iquique, capital of Tarapacá Region, is based primarily on international trade through the free zone and port Zofri with copper mining.