Original: The expression Istrian exodus or Istrian-Dalmatian exodus is used to indicate the departure of ethnic Italians from Istria , Rijeka , and Dalmatia ( present-day Croatia ) , after World War II .
Simplified: The expression Istrian-Dalmatian exodus is used to indicate the diaspora or forced migration of ethnic Italians from Istria , Rijeka , and Dalmatia , after World War II .