sentences:  Carl Krebs worked as a war surgeon in World War, from 1939 to 1940 with the Danish Ambulance service in Finland and later from 1941 to 1943 with the Finnish Army.In 1940 he was employed by the (then neutral) United States at their Berlin Embassy to monitor conditions of Allied Prisoners held in German camps.In 1945 he served as Denmark's representative for the Red Cross, in the evacuation of Danish and Norwegian prisoners in Germany with "de hvide busser", or "the White Buses", a transport organization that brought Danish and Norwegian concentration camp prisoners from Germany to Sweden during the last months of World War II.