strong Incan influence in Prehispanic times.
Colonial Era
Spanish colonization obviously caused some changes; however, the hostile climate impeded establishment of greater control. These changes influenced the control of trade routes that crossed the desert and communication to the port of Cobija with the deposits of Potos� silver and the cattle farms of Salta and Tucum�n. In this sense, Calama continued as a main point of provision for commercial routes. In the 18th century, with the Bourbon Reforms, Calama depended directly of the Intendencia de Potos�.
Bolivian Republic Era
After Bolivia's Declaration of Independence (6 August 1825), and with gradual changes in the administration of the territory, Calama remained constituted under the Departamento de Litoral (1829), subdivided in the Provincia de Lamar y la Provincia de Atacama (Cobija being the departmental capital). Calama was an important town in the Atacama Province, through which traveled the weekly mail between Cobija and Salta-Potos�, since 1832. In 1840, the provincial capital transferred from Chiuchiu to Calama, increasing the communication boom.
The border conflicts between Chile and Bolivia did not reach either Calama or the Atacama Province. The greater dispute concentrated in the central prairie and in the coast, where they began to discover rich silver deposits, saltpeter, and guano. The ambiguity that led to the frontier conflicts was the possession of the central plain and the Atacama coast. The environment was made tense when Chilean troops, under the command of colonel Emilio Sotomayor Baeza, invaded the port of Antofagasta on the morning of February 14, 1879. Later, Bolivia declared war on Chile on March 1.
Chilean Republic Era
Since that day, the changes in the administration have been very deep. It being part of the administrative center of 2� order in Bolivia, returned as one of 4� order under the Chilean administration
