Dodecanese islands were occupied by the French and British, but Rhodes remained under Italian occupation. In 1915, the French also occupied Kastellorizo. Following the war, the Tittoni–Venizelos agreement, signed on July 29, 1919, called for the smaller islands to join with Greece, while Italy maintained control of Rhodes. The treaty further outlined an exchange where Italy would receive Antalya for southwest Anatolia. The Greek defeat in the Greco-Turkish War and the foundation of modern Turkey prevented the exchange. Italy formally annexed the Dodecanese as the "Possedimenti Italiani dell'Egeo" under the terms of the Treaty of Lausanne. Mussolini embarked on a program
Dodecanese Regiment that no operation in the Dodecanese had been planned or was possible. The GHQ was firmly convinced that the liberation of the Dodecanese would be a postwar procedure depending on the outcome of the Albanian Front. After a short but intensive training, the Dodecanese Regiment received the war flag on January 12, 1941. It was the only adequately trained, fully manned, staffed and equipped regiment available as a reserve, and therefore it became the core of the newly formed 20th Infantry Division, which soon was to include the also newly formed but thinly manned 35th and 80th Regiments, comprising low