Best lines
One of the best (already mentioned here) is "You are not worth the reversal of a Custer order." Ususally his ego is blamed for getting people killed (on BOTH sides), but here, his ego SAVED someone!
Another one (though I don't remember just how it goes) is when the con man played by Martin Balsam tells Jack that he lived with the chief too long, because after living with him, he isn't cynical enough to be a good con man. In other words, he's criticizing an Indian for being philosophical, instead of criticizing him for being a savage!