Why did they move?

The end of the Continuation War

Soviet Union started so called terro rbombings of Helsinki in 1944. This resulted in another big wave of children being sent to Sweden. The Continuation War came to an end in September 1944. During the war, Finland lost:
over 270 000 men killed, wounded or missing;
the homes of 420 000 Finns;
12% of its area according to the peace settlement.