Why were children evacuated? People expected cities to be bombed, as enemy planes tried to destroy factories. But bombs would hit homes and schools too, so children would be in danger. The government tried at the start of the war to 'empty the cities' of children and mothers, This was 'evacuation', to protect them from air raids.
The plan was put into action in September 1939. About 800,000 children left their homes. However, many returned home after a few weeks. Others stayed in the countryside for the rest of the war.