This paper is inscribed within of studies on the history of the labor movement during the years \u2760s and \u2770s in Argentina and aims to analyze the union dynamics and the labor conflict of a particular actor within the labor movement of the Gran La Plata region: the workers of meat the Swift and Deltec located in Berisso. Through both a quantitative and qualitative analysis, developed from newspaper sources, the Informes Laborales del Servicio de Documentación e Información Laboral (DIL) and Archivo de la Dirección de Inteligencia de la Policía de Buenos Aires (DIPBA), we will focus on the dynamics presented by labor unrest, in the situation that the industry in which these workers were inserted, the internal organization of the...