Deportation is the expulsion of a person or group of people from a place or country. Today the expulsion of foreign nationals is usually called deportation, whereas the expulsion of nationals is called banishment, exile, or penal transportation. Deportation is an ancient practice: Khosrau I, Sassanid King of Persia, deported 292,000 citizens, slaves, and conquered people to the new city of Ctesiphon in 542 C.E. Britain deported religious objectors and criminals to America in large numbers before 1776, and transported them to Australia between 1788 and 1868.
Read more about Deportation: Military Occupation, External Deportation, Internal Deportation, Deportation in The Holocaust, Soviet Deportations, 2010-ongoing French Romani 'repatriation'