One of the largest operations of the Second World War on our territory. Often unknown archival materials interspersed with a series of animations depict the significant events of the 1930s and 1940s in Ostrava, Opava and Teschen. During the Second World War, heavy fighting took place on our territory, in 1945 the front was moving very fast from the east and the Ostrava region was one of the best fortified and defended sections of the front. We will get acquainted with the combat technology that finally succeeded in breaking through the fortifications.