 The Una–Butužnica railroad was one of eight being built in Yugoslavia by two French civil engineering companies, "Société de Construction des Batignolles" and "Société Edmond Bayer de Agner".Đujić wished to minimise the influence that the communist-dominated United Workers Syndicate Union of Yugoslavia held over the work force in Dalmatia, and presented himself as a man out to defend the rights of workers throughout the country.The strike began on 15 May, on the Srb–Dugopolje road.