 During the World War II German @-@ led Axis invasion of Yugoslavia in April 1941 , Morava was the flagship of the 2nd Mine Barrage Division , and operated on the Tisza river . She fought off attacks by the Luftwaffe , and shot down one enemy aircraft , but was forced to withdraw to Belgrade . Due to high river levels and low bridges , navigating monitors was difficult , and she was scuttled by her crew on 11 April . Some of her crew tried to escape cross @-@ country towards the southern Adriatic coast , but most surrendered on 14 April . The remainder made their way to the Bay of Kotor , which was captured by the Italian XVII Corps on 17 April . She was later raised by the navy of the Axis puppet state the Independent State of Croatia and continued in service as Bosna until June 1944 , when she struck a mine and sank . 
