Our collection of museum objects began during the Second World War, especially under the auspices of the Partisan Scientific Institute. In the first years after the war, a special field group worked in the museum with the task of planning the collection of museum material important for Slovenian history. Then the collection was taken over by the museum's professional colleagues. The collection of museum objects was especially enriched during the preparation of permanent exhibitions and is further enriched during the preparation of occasional exhibitions, during important events, or by exchanging material with related institutions. The museum collections were originally related mainly to war and the military, but over time we acquired more and more objects related to everyday life from all periods of the 20th and 21st centuries. New collections are also being created, including the Oral History Collection, which includes audio and video testimonies. We are constantly supplementing our already extensive Photographic Collections with newly acquired material.