Documentary film about the "zanja de Alsina", a long trench dug in the Argentinian Pampa in 1876 as way to separate the "civilized" from the "barbarians" during the massacre of indigenous peoples known as "campaña del desierto".
Osvaldo Bayer
Marcelo Valko
Juan José Estévez
Gastón Partarrieu
Eduardo Hiriart
Alberto Orga
Jorgelina Walter
Armando Nervi
Federico Aimetta
Sebastián Díaz