Captain Corelli's Mandolin (2001)

In 1941, Italy allies with Germany and ruthlessly conquers the much weaker country of Greece. On a remote Greek island, an Italian artillery garrison is established to maintain order. One Italian officer, Captain Corelli, adopts an attitude of mutual co-existence with the Greeks and engages in such activities as music festivals and courting the daughter of a local doctor. In 1943, however, after Italy surrenders to the Allies and changes sides in the war, Captain Corelli must defend the Greek island against a German invasion.