Define 'the Entire Mediterranean'. The Second World War had operations of various sorts, many of them invasions, taking place in North Africa (the Italians, 8th Army, Afrika Korps, and later Torch), Gibraltar (Vichy France), the South of France (Operation: Dragoon and the Fall of France), Italy (by the Allies), the Balkans (by the Axis then Allies), the Dodecanese (by the British), Greece (by Italy, Germany, and later the Allies), Malta (repeated Axis bombings), Spain (by the Republicans)... everywhere but Turkey. (At least, as far as I know.)