Barbara Stanwyck plays a guileful innocent, a warm-hearted dame better than both her suitors in her generous and wise understanding of human nature. Joel McCrea plays a super-stolid hero whose better part is realized by his attraction for Stanwyck's character; and Robert Preston is a flim-flam man, a gambler and crook whose love for Stanwyck's "Molly Monahan" redeems his otherwise unrepentent self.
De Mille plays this beguiling troika against the "canvas of history" and so personalizes the abstraction of history. John Ford's "Stagecoach," also released the same year, 1939, is more accomplished and its story more subtle, but not so much more. De Mille obviously enjoys his broad canvases, and his "history" tends to pompous pronouncement at times, but all history is biography for him, which means that -- just as with Ford -- the individual stories are what is important.
You'll like this movie: you'll love "Missy" Stanwyck, McCrea and Preston -- you'll even forgive its somewhat more than occasional moments of silliness.