Vardar was a Sava-class river monitor built for the Austro-Hungarian Navy by Stabilimento Tecnico Triestino, and was laid down as Bosna at Linz in 1914, as part of the Austro-Hungarian 1914-15 Naval Program.
Her main armament was a twin gun turret of /L45 guns forward of the conning tower and a twin turret of /L10 howitzers aft of the conning tower.