Almost all of the fleet was captured by the Axis powers during the April 1941 invasion of Yugoslavia, but a few vessels escaped to form the KM-in-exile, which operated under British supervision.
She was an obsolete coastal defence ship when acquired by the Navy of the Serbs, Croats and Slovenes in 1921, and was scrapped the following year.
[2][3] The former Gazelle-class light cruiser SMS Niobe had been commissioned into the Imperial German Navy in 1900, so by 1941, Dalmacija was obsolete and was being used as a gunnery training ship.
Zagreb was scuttled during the Axis invasion of Yugoslavia, but Beograd and Ljubljana fell into Italian hands.
Lubiana was lost in April 1943, but Sebenico was captured by the Germans after the Italian capitulation, and saw service as TA43 until she was scuttled at the end of the war.
[12] The gunboat and royal yacht Beli Orao came into service in 1939 and was captured by the Italians in April 1941 during the invasion.
Two were lost or scrapped prior to World War II, and the rest were captured by the Italians during the 1941 Axis invasion and put into service by them.
The two boats that were returned to the KM-in-exile were transferred to the Yugoslav Navy at the end of the war and served as Golešnica and Cer.
The boat that escaped was used as an anti-submarine warfare training vessel, and was transferred to the Yugoslav Navy at the end of the war and renamed Tara.
Five were lost prior to the Italian capitulation in September 1943, but one was transferred to the KM-in-exile in December of that year, and survived the war to serve in the post-war Yugoslav Navy as Pionir then Zelengora.
Captured by the Germans in April 1941, she saw service in the seaplane tender, aircraft rescue and troop transport roles as Drache.
Two were captured by the Germans at the time of the Italian capitulation in September 1943, and were lost in their hands or while serving with the Navy of the Independent State of Croatia.
[12] At the time of its formation in 1921, the KM obtained four former Austro-Hungarian Schichau-class torpedo boats that had been converted into minesweepers.
The latter ship was captured by the Italians in April 1941 but survived the war to see service in the post-war Yugoslav Navy.