The article describes the activities of the Regional National-Liberation Committee for the Slovene Primorska region and Trieste, which operated from September 15, 1944 to February 23, 1947. It was established as the highest administrative and authoritative body in the Slovene Primorska region and, after the end of World War II, in Trieste and other cities as well. After the Belgrade Agreement of June 9, 1945, and after the establishment of the allied military administration in zone A of the Giulia Region, the committee lost its authoritative function. Thus, it concentrated most of its activities toward the effort to cede the Slovene Primorska region and Trieste to Yugoslavia.