Reflect on the concept of territorialization as a political and cultural transformation of ethnic territories in state territories is one of the goals of this dissertation. Carry out an historical investigation of the establishment of contacts between ethnic groups and state agents of Strategic Telegraph Commission of Mato Grosso to Amazonas, the state republican representatives, is a focus of the study. Point out the administrative articulations historically built between the Rondon Commission and the Regional Inspectorate of the Indian Protection Service for the state of Mato Grosso is the hub of research. Through the re-baptism of strategic points in the geographical area inhabited by indians and the installation of telegraph stations and indian posts in the region of Mato Grosso, military agents promote a process of nationalization, colonization and land use planning that would lead to profound transformations on indigenous groups. The construction of a telegraph station and an indian post in a region baptized by Rondon produce the state territory. The indians, in turn, participatory of the historical process and builders of their own territoriality, establish new political alliances with external actors driven by the interest of their communities.