On 14 September, the first Allied loss occurred, when the Greek submarine RHN Katsonis, was rammed and sunk by U-boat hunter UJ 2101.
On the night of 10/11 November, destroyers HMS Petard, Rockwood and ORP Krakowiak bombarded Kalymnos and HMS Faulknor bombarded Kos, where German forces were assembling for the attack on Leros.