This is shown by the fact that during the Norwegian Campaign against the German invasion in April 1940, a Finnish group of volunteers formed an ambulance unit and helped the defenders until forced to return home because of the success of the German armed forces.
Det ses bl.a. af, at under invasionen af Norge i april 1940 dannede en gruppe finske frivillige en ambulanceenhed og hjalp forsvarerne, indtil de blev tvunget tilbage af den tyske hærs fremrykning.