SS Polynesien was a French passenger ship that was sunk on 10 August 1918 in the Mediterranean Sea off Valletta, Malta, by a torpedo launched by , captained by Eberhard Weichold.
The ship was en route from Bizerte, Tunisia, to Thessaloniki, Greece. On board was a detachment of cadets and personnel of the Royal Serbian Army, including Serb heroine Milunka SaviÃÂ. Most of the cadets survived the sinking, as did SaviÃÂ, but eleven crew members and six passengers died.
The survivors were taken to Malta and recuperated at Cottonera Hospital.