This is not a fiction film. In fact, it reveals the way the guerrilla movement Tupamaros acted in Uruguay during the 70s. For those young people, it is necessary to remind that this left-wing movement was not a guerrilla in the mountains but an urban one, operating mainly in Montevideo. They used to kill esbirros (nasty policemen and agents) and to make justice against the existing dictatorship whenever it was required. The movement operated in a secret and compartmented way, i.e. many of the members did not know each other, thus avoiding to be eliminated by denunciation. Costa Gavras was able to draw the way Tupamaros acted in Uruguay, and also an important happening of those days, the way the CIA agent Mr. Dan Mitrione (Yves Montand) was killed. In fact this movement was disarticulated once new police agents infiltrated in the movement, and the main leaders were discovered. Mitrione was killed but this did not prevent that another CIA "pinch-hitter" for Mitrione came later to replace the dead man. The film may seem as sympathetic to Tupamaros, partially it might be, but this is rather a subtle critic to their methods than congratulation for what they did.