You really need to know that this is WWII as only Quentin Tarantino could tell it. There is nothing remotely historical about this movie. In fact it occurs in some alt-history universe. That said it is pure Tarantino film making. The trailers are a pretty good snapshot of the movie, but be aware that much of the film is in German or French with English subtitles. It's a little long at 2 1/2 hours, but I don't think you'll be looking at your watch too often. This one is definitely worth the price of admission, even a full price evening showing.
Oh by the way, to quote another movie...there will be blood.