The situation in the 70s before the junta was indeed out of control,some provinces had already been under ''estado de sitio''with death penalty included, in 75 italo luder signed the aniquilacion de la subversion( use your translate and see what you come up with)all of this was done under a democratic regime elected by the people, the same people that couldn't wait for something to happen about this whole mess of peronistas killing other peronistas for not being peronistas enough,so, the military coup happened and the legislation vacated willingly the senate(see a parallel yet).
First day of the junta in power found argentina with tanks on the streets and all armed forces on high alert
The junta's first message to the people of argentina was, all constitutional rights suspended for the time being, all orders coming from police, armed forces , or security forced were to be followed , no questions asked,also they asked the population not to engage in activities that could be understood as suspicious ( no more than 3 people gathered on the streets at one time)......the rest is history, depending whose history you read....
The bottom line as i understand it is, before the junta took over there were rebel groups armed with intent to do away with the republican system, when the junta left , there were no more....