Episode 08 - Poland Invaded, Britain, France Mobilise: Poles Invoke Treaty, Britain Declares War against Germany over Poland, France also Acts. Let's Play Hearts of Iron 4 Death or Dishonor 1.4.2 with Black ICE 2.5.2 Together for Victory DLC is here too. I will be giving historical & game play commentary during this series. This will generally be a historically plausible playing of the game. I would like to hear feedback from the viewers. This playthrough of Hearts of Iron IV Please remember to like this video & subscribe to this channel!