Aetos was a Greek Thiria (wild beast) class destroyer, ordered from Britain by Argentina as ARA San Luis. The Greeks purchased the four ships just before the outbreak of the First Balkan War. Commissioned in 1912, Aetos was initially classified as a scout, since there were no torpedoes available. Like most of the Royal Hellenic Navy, Aetos was seized in October, 1916, by the French and British, due to Greece refusing to enter World War I. After serving in the French Navy for a while, Aetos was returned to Greek control in 1918, and finished the War running escort missions in the Aegean. She helped evacuate Greeks from Russia during the latter's Civil War, and fought the Turks in the Greco-Turkish War of 1919-22. Thoroughly modernized in 1925-27, Aetos was further modified in 1936-37, receiving mine-laying rails. She managed to survive the German invasion in 1941, and operated with the British in the Indian Ocean, with periodic upgrades to anti-air and anti-submarine weapons. Aetos decommissioned in 1945, and was subsequently scrapped.