Since the time of the British Empire, many people have moved to the UK. After World War II, the UK needed more people to fill labour shortages, so it motivated Commonwealth citizens to come to Britain; viewed by many as the "mother country". During the Great War, one quarter of a million Belgians came to Britain to escape the wrath of the war. During the 1930s before World War II, Jews started to migrate to the UK with the rise of Hitler and fascism across the continent. During the 1940s to 1960s, Polish people were invited to come and stay in the United Kingdom with the promise of jobs and a house. Due to the massive migration of Polish people since, the Polish community is deeply anchored in present society. From the 1950s to 1960s immigrants from Pakistan and India settled in the UK. The year 1972 saw a further increase in Asian arrivals in the United Kingdom, those who had been expelled by dictator Idi Amin of Uganda. Though the immigrants helped the UK by contribution to the workforce, racism was a big problem in British society.