This Parks Canada publication discusses the time period of 1945–1951 (following the Second World War) where over 157,000 refugees came to Canada and were often referred to as 'displaced persons' due to the war.
This marked a major change in Canada's immigration policy and history, and the influx of refugees has greatly contributed to the multi-cultural diversity in Canada today.
Following the Second World War, Canada's immigration policy slowly began liberalizing and attitudes towards Jewish and Chinese immigration began to shift as well.
The first steps towards immigration liberalization policy in the post-war period was Order-in-Council P.C.