This map shows the gradual formation of the Greek nation from 1830 forwards. During the Balkan wars and during WWI, Greece occupied parts of northern Epirus that eventually were to become part of Albania. In the aftermath of WWI, during the Greco-Turkish war, Greece occupied parts of Turkey. Western Thrace was to become part of Greece. Eastern Thrace and the areas occupied on the Anatolian mainland of Turkey were to remain part of Turkey. The offices abroad, shown on this map, date from the time that the areas in which they are located were under Turkish rule. As these areas became part of Greece, the offices were closed. The complex developments in the formation of Greece have led to many local and occupation issues.