The objective of this paper is to analyze the transformation process of the Colombian Army between 1960 and 1965, which was driven by the political decisions of the rulers, the intervention of the Armed Forces, and by factual gambles made by the military to eliminate the first revolutionary guerillas. Through this, we expect to argue two hypotheses: first that the relationship between the Army and the civilian government was ambiguous during a period of institutional transition; and, second, that political subordination and military autonomy were breached by the intromission of military players in the political scene, and by rulers in the military scene. [ABSTRACT FROM AUTHOR]