Fiume heavy cruiser started on April 29, 1929 in Trieste technology company, launched on April 27, 1930, and be completed by November 23, 1931. Zara class heavy cruiser second ship. After the completion of Fiume programmed attached to the first clan cruiser detachments. until 1940 when Italy entered the war, From 1936 to 1937 during the civil war in Spain, the Fiume was in Spanish waters. In April 1939, Fiume and Pola were involved in the invasion of Albania. On March 29 1941 she was engaged in the , Mata Cape Matapan naval battle with British Royal Navy battleship HMS Warspite HMS Valiant and HMS Barham