In the middle of movie when the pack is going down the stairs the man in lead has a lighter burning. It is obvious a flashlight is directed at actors to create more light ambiance.
In World War II Finland only collaborated with Germany in 1941 after Finland had already been attacked by the Soviet Union in 1939. Finland only retook the land ceded at the end of the Winter War. US citizens did assist Finland in the Winter War against Soviet Union (as ambulance drivers) and UK and USA both supported Finland at this time.