Greco-Italian War - Naval Operations

Naval Operations

At the outbreak of hostilities, the Royal Hellenic Navy was composed of the old cruiser Averof, 10 destroyers (4 old Theria class, 4 relatively modern Dardo class and 2 new G class destroyers), several torpedo boats and 6 old submarines. Faced with the formidable Regia Marina, its role was primarily limited to patrol and convoy escort duties in the Aegean Sea. This was essential both for the completion of the Army's mobilization, but also for the overall resupply of the country, the convoy routes being threatened by Italian aircraft and submarines operating from the Dodecanese Islands.

Nevertheless, the Greek ships also carried out limited offensive operations against Italian shipping in the Strait of Otranto. The destroyers carried out three bold but fruitless night-time raids (14–15 November 1940, 15–16 December 1940 and 4–5 January 1941). The main successes came from the submarines, which managed to sink some Italian transports. On the Italian side, although the Regia Marina suffered severe losses in capital ships from the Royal Navy during the Taranto raid, Italian cruisers and destroyers continued to operate covering the convoys between Italy and Albania. Also, on 28 November, an Italian squadron bombarded Corfu, while on 18 December and 4 March, Italian task forces shelled Greek coastal positions in Albania.

From January 1941, the RHN's main task was the escort of convoys to and from Alexandria, in cooperation with the British Royal Navy. As the transportation of the British Expeditionary Corps began in early March, the Italian Fleet decided to sortie against them. Well informed by Ultra intercepts, the British fleet intercepted and decisively defeated the Italians at the Battle of Cape Matapan on 28 March.

With the start of the German offensive on 6 April, the situation changed rapidly. German control of the air caused heavy casualties to the Greek and British navies, and the occupation of the mainland and later Crete by the Wehrmacht signaled the end of Allied surface operations in Greek waters until the Dodecanese Campaign of 1943.