Nyorera kupfuurira kweiyi ndima - Munguva yake yemakore gumi ehutungamiri, Prieto akawedzera simba rehurumende ndokuisa hwaro hwehurumende muChile. Nzvimbo dzokutanga dzokudzidzisa dzakadai se"Instituto Nacional" dzakavambwa uye muna 1837 hurumende dzezvemitemo nedzokudzidzisa vanhu dzakasikwa. Mutemo wezvekunze waPrieto wakanga uchitongwa nehondo yeChile nePeru
pakati pa1836 na1839. Mauto eChilean pasi paManuel Blanco Encalada akatambura kurasikirwa kukuru, uko kwakaguma muChibvumirano chePaucarpata, mushure mezvo Manuel Bulnes akatora hutungamiriri hweuto uye akaitungamira muhondo yekukunda yeYungay.