had already done so in Peru. In September 1836, the Chilean confidential agent Francisco Javier Rosales showed Rosas documents in this regard, which confirmed the rumors that the unitary Juan Galo Lavalle was in negotiations with Santa Cruz to establish a state between Argentina and Bolivia. The possible Argentine-Chilean alliance Persuaded by the minister Diego Portales, José Joaquín Prieto declared war on November 11, 1836, with the northern Peruvians opposed to Santa Cruz and its confederation. Portales communicated the declaration to Rosas and asked him to do the same by virtue of the tacit understanding between the two countries and reiterated the offer to sign an alliance treaty. On December 28, 1836, Rosas wrote to the governor of Salta Felipe Heredia: because Bolivians only live on the tribute of the Indians and what the Cerro and Casa de Moneda de Potosí produce (...) and the seizure of that Villa assures me that it is not a company of great difficulty (...) it owes us the millions of pesos that we have spent for their freedom and independence in the war against the Spaniards (…) and they owe us the Argentine blood that has been spilled in this war (…) Understand that, once Tarija has been restored, the Suypacha River will have to divide the territory of both republics; But it seems to me that if we can ensure that the Villa de Tupiza and the town of Santiago de Cotagaita remain within our territory, it will be the best and most important thing to ensure peace and free trade between both States forever, with all the advantages that I have indicated. In exchange for doing this good I think we could forgive the expenses made in the War of Independence and also the benefits that they have taken from Tarija in all the time it has been usurped. But to obtain all these things it will be necessary to penetrate to the Capital of Bolivia, and have the Cerro de Potosí for us. Such an important acquisition must be at work with the exclusion of the Salteños and Jujeños On February 13, 1837, there was a border incident when a Bolivian party entered Argentine territory in the Cochinoca area in search of Colonel José Cáceres, who was recruiting soldiers and they arrested him. On the same February 13, Rosas declared closed all commercial, epistolary, and other communication between the inhabitants