From 1945, at a moment when the international consensus had turned in favor of the allied forces, the Argentine military regime, in power since 1943, witnessed their legitimacy being contested by a democratic opposition, supportive of the Allies, essentially recruited from traditional political parties, antifascist civil associations and the university campus. In May of that same year, members of this anti-governmental coalition decided to take their message to the street and express, in a physically public space, their commitment to the values of the Constitution and to the principle of freedom. By August, they had a clear idea that what they had to do was organize, within legal parameters, a great civic mobilization, in order to prove the incontestable fact that the people of Argentina, in unison, rejected the Nazi-fascist dictatorship. The “Freedom March for the Constitution” created a visual message that exposed, once and for all, impressively and unanimously, the isolation of the regime and of its figurehead, Juan Domingo Peron.