You wouldn't be too far wrong to apply the term "clearance" to the Canadian government's internment of citizens of the Austro-Hungarian Empire (Ukrainians, Moldovans, Hungarians and quite a few others) during the First World War, and everybody in Canada who looked Japanese during the Second World War. Those folks were ordered off their land and forcibly moved to places where they did not want to go. It was done out of (misplaced) concern for national security, not to free up the land for other uses, but the results were similar.