This paper addresses some aspects of the history of a political-military organization emerged in the early years of the decade of the seventies: Montoneros Sabino Navarro (SN). The SN arose from an earlier detachment of Montoneros, thus becoming the first political dissent of what was the political-military organization flagship of the argentinian peronist left, achieving to consolidate in major industrial cities. The focus is upon its uniqueness in comparison in the complex field of armed peronists organizations, the inquiry into aspects of the subjective experiences of the protagonists of such experience and the tactical and strategical definitions assumed by the SN. Finally it should be noted that this is a gray area or little explored by historiography.