Colonisation of the jungle had a brief rest bite during Peru’s war with Chile, but started up again soon after at the beginning of the XX century. This time, however, it was driven by two principle aims: finding routes through the jungle to navigable rivers and use of the Amazon’s resources both in the central jungle and in the low lands, where rubber fever had taken hold.
Nuevamente el impulso colonizador decae en la época de la guerra con Chile y renace en dos frentes luego, con la búsqueda de rutas transversales hacia ríos navegables y el aprovechamiento de tierras, nuevamente en la selva central, y la fiebre del caucho en la selva baja.