Chile and Peru Tacna-Arica and US Involvement

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The war of the Pacific was ended by two different international agreements which changed the limits among the three countries involved (Map 1.) In October, 1883, Peruvian and Chilean representatives signed the Treaty of Ancon, by which Chile incorporated the Tarapaca province. On the other hand, the final treaty of peace and boundaries with Bolivia was signed in 1904, two decades later. By this treaty Bolivia ratified the Chilean sovereignty over the Atacama desert territory” (Antofagasta province) accepting its condition as a landlocked country.

Nevertheless, territorial problems between Peru and Chile were far from over and the seed for a new controversy was right in the Ancon Treaty. The United States -in spite of its problematic relation with Chile- would become an active participant in the search for a solution of the territorial problem between the South American countries.

a. The Treaty of Ancon and the New Difficulties between US and Chile

According to Sater, by the final days of the War of the Pacific, Chile was “weary of the bloody war” and accepted to control Tacna and Arica provinces for only ten years if Peru ceded Tarapaca. Peruvians agreed and the treaty was signed. In its article 3º the agreement established that after a decade, “the two nations would conduct a plebiscite to determine the status of the disputed lands.” However, by 1894 the plebiscite had not been held yet.

Skuban states that, in their claims for that situation, Peruvians argued that the phrase expirado este plazo should be understood as at the expiration of that term, so “the plebiscite should have been held precisely on March 28, 1894, the exact day on which the Peruvian Congress ratified the treaty in 1884.” Nevertheless, Chileans insisted ...

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During the Washington Conference (started on May 15, 1922) Peru and Chile presented their arguments and evidences to consideration of the President of the United States. Finally, through an Arbitration Protocol and a Supplementary Act -signed on July 20- both countries submitted to the US President “the question whether […] a plebiscite [had or had not] be held” in Tacna and Arica. Although The New York Times, as quoted in Joe F. Wilson, states that “Hughes and Harding were very reluctant to accept the role,” William Skuban suggests that the American President was “eager […] to demonstrate the postwar, international leadership role of the United States.” The Tacna-Arica problem seemed to offer a good opportunity to do it, but -how L. Ethan Ellis says- that matter will become in a Pandora’s Box, for the US government and its international prestige.

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