Much has been discussed about the phenomenon of Montoneros during the period 1970-1976. However, little is known about his political background. In general, studies about this organization are constructed from the point of view that this organization had of itself or in an exclusively empirical way. It also extends to the issue of the political experience of the militants and the programmatic nature of Montoneros, confusing political background of individuals with a history program of the organization. In this article, we propose to investigate in this second aspect of the analysis from one of the tributaries of the program of national liberation: the National Liberation Movement (MLN-Malena).