(Not to be confused with Yugoslav Navy.) The Royal Yugoslav Navy (Serbo-Croatian: Kraljevska Jugoslavenska Ratna Mornarica, Кpaљeвcкa Југословенска Pатна Морнарица; KJRM), was the navy of the Kingdom of Yugoslavia, and existed between 1921 and 1945. It was brought into existence as the navy of the Kingdom of Serbs, Croats and Slovenes, and initially consisted of a few former Austro-Hungarian Navy vessels surrendered at the conclusion of World War I and transferred to the new nation state in 1921 under the terms of the Treaty of Saint-Germain-en-Laye. The only modern sea-going warships transferred to the new state were eight steam-powered torpedo boats, although it did receive four capable river monitors for use on the Danube and other large rivers. Significant new acquisitions began in 192