Italian colonists in the Dodecanese the island of Rhodes. Approximately 40,000 Italian soldiers and sailors were on military duty in the Dodecanese islands in 1940. The appointment of Fascist quadrumvir Cesare Maria De Vecchi as governor of the Italian Aegean Islands in 1936 marked a turning point. De Vecchi promoted a more vigorous and forceful program of Italianization, which was only interrupted by Italy's entry in World War II in 1940. Indeed, he promoted the possible unification of the islands to Italy as part of the fascist ideal of an Imperial Italy. During World War II, Italy joined the Axis Powers, and used the Dodecanese
Kasos island formally joined the Kingdom of Greece on 7 March 1948 together with the other Dodecanese islands. Kasos Kasos (; , ), also Casos, is a Greek island municipality in the Dodecanese. It is the southernmost island in the Aegean Sea, and is part of the Karpathos regional unit. , its population was 1084. The island is known in Italian as "Caso". Kasos lies southwest of Karpathos, between this island and Crete. Adjacent to the island is the Strait of Kasos, through which some of the Modified Atlantic Water enters the Sea of Crete. Its shape is elliptic and resembles