The Attack on Convoy BN 7, took place from 20 to 21 October and was the only destroyer attack on a convoy, despite gaining precise information on BN convoys as they passed French Somaliland. The 31 ships of BN 7 were escorted by the cruiser "Leander", the destroyer , the sloops "Auckland", and with the minesweepers and , with air cover from Aden. "Guglielmo Marconi" and "Galileo Ferraris", stationed to the north, failed to intercept the convoy but on 21 October the destroyers "Nazario Sauro" and "Francesco Nullo" with the destroyers "Pantera", "Leone" attacked BN 7 east of Massawa; the attackers caused only superficial damage to one ship.