A review of Border(s) Studies is introduced from an ethno-historical point of view, addressing the discussion from the angle of the Iberian fixing of frontiers and the different ways of expelling people from their lands to later occupy their territories. That occupation turned into a legal precedent and later on, this model was transferred to America. Similarly, we seek to examine the manner in which this model was perpetuated with the attainment of independence in the 19th century and the creation of republican states. This article presents a broad analysis of the concept of the border in the Euro-American ambit which, as it develops, is unavoidably joined to the ones of territory and territorialities.