Chile gained the provinces of Tarapacá, Antofagasta, Arica and Tacna (this last one was given back to Peru in 1929) in where Chile obtained numerous reserves of [[Saltpeter]], [[Copper]] and [[Lithium]] that sustain the Chilean Economy. | Chile gained the provinces of Tarapacá, Antofagasta, Arica and Tacna (this last one was given back to Peru in 1929) in where Chile obtained numerous reserves of [[Saltpeter]], [[Copper]] and [[Lithium]] that sustain the Chilean Economy. |