How did the governments of Britain, America and Nazi Germany use the cinema to boost the morale of the people and persuade them to contribute to the war effort?

This is my history dissertation, sadly this dissertation wasn't exactly the Citizen Kane of History dissertations but apparently it was much better as a film essay rather than a history essay. This inevitably became my downfall, and briefly rereading through my dissertation I completely agree with that assessment (and noticed other flaws). I suppose, however, that fact makes it more appropriate to publish the dissertation here. The dissertation will be released in instalments, I am going to start with part 1 because I'm not George Lucas.