Ierax (Greek: ΒΠ Ιέραξ, "Hawk") was an Aetos-class destroyer which had been built for Argentina as Santa Fe.

Four sister ships, Aetos, Ierax, Panthir and Leon, had originally been ordered as the San Luis class by Argentina from the English shipyard Cammell Laird in Birkenhead.

During the Balkan Wars, the Royal Hellenic Navy purchased only the minimum amount of ammunition, 3,000 rounds of torpedoes.

She also participated in the Second World War, after surviving the German invasion of April 1941, Ierax was based in Alexandria, Egypt.

In April 1944, a wave of mutiny swept through some of the Hellenic Royal Navy, with seamen agitating in favor of the pro-Communist guerrillas, ELAS, who were fighting a campaign in Greece against the occupying Nazis.