"Operation Massacre") is a 1973 historical drama film co-written and directed by Jorge Cedrón and based on the nonfiction book of the same name by Rodolfo Walsh,[1] who also wrote the script.

It stars Norma Aleandro, Víctor Laplace, Ana María Picchio, Walter Vidarte and Julio Troxler [es; fr].

It was filmed clandestinely (in hiding) during the self-styled "Argentine Revolution" dictatorship (1966–1973), and finally released on September 27, 1973.

[2] In 1956, one year after the self-styled "Liberating Revolution" dictatorship deposed Argentine president Juan Perón in a coup, a civil-military insurrection failed in its attempt to take on the power in the name of peronism.

[3] In retaliation, in a vacant lot in the city of José León Suárez (province of Buenos Aires), several civilians accused of being part of the uprising are illegally shot by the dictatorship.