Don't mention the war. Or rather, don't use it as an historical reference point from which to draw context for the new trailer for Wolfenstein: The New Order.
Set in an alternative history that sees the Nazis win World War II (and enforce radically different refereeing policies, as you'll see from the video), The New Order takes place three years after the events of 2009's barrel-blazing Wolfenstein. A resourceful, heavily-accented team of resistance fighters is fighting back against the Reich forces, led by suitably twisted Colonel Deathshead. It's up to you to stop the Reich once and for all.
If giant guns, mechs and blowing up Nazi's is your idea of a good evening in (which it should be), then you best press on with the trailer.