Rebellion in Patagonia
It was written by Olivera with Osvaldo Bayer and Fernando Ayala , based on Osvaldo Bayer's renowned novel "Los Vengadores de la Patagonia Trágica" ( "The Avengers of Tragic Patagonia" ) , which was based upon the military suppression of anarchist union movements in Santa Cruz Province in the early 1920s . 
<triplet> military suppression <subj> Santa Cruz Province <obj> location <subj> 1920 <obj> start time