Northwest Passage is a very good account of the attack on St. Francis. It is very accurate in many ways and I recommend it highly.
Robert Young plays a fictitious character shot though the mid-section and was still able to walk all the way back to civilization. Beleive-it-or-not, it did happen. I believe the real man's name was Lt.Ogdon. He did survive such a wound in that battle.
Spencer Tracy is excellent as usual and the scenery is beautiful.
Some will say that the film is racist and brutal. It was; but this is an historical film and you must view it, or any historical film or book, with the morals of the time in which it is set. You cannot look at it with present-day morals. If you are unable to do so, then, to be an educated person, you need to read more history and learn what things were like and what people thought about the American Indians, and the French for that matter, in the 1750's and 60's. Thus you will learn how far we have come in the last 200 years in our relations with other peoples. We may not be perfect yet, but we're getting there.