The film adaptation of Dad's Army exemplifies war as almost a joyous farce, and thus far removed from reality.
It is in this film that Dad's Army illustrates how the Home Guard was a propaganda manoeuvre brought about as a means to induce a sense of patriotism among the British people. Therefore all Dad's Army had to defend the country was indeed propaganda, and little else.
The propaganda induced patriotism has subsequently been undermined by the Hollywood hijacking of this piece of Britain, which ironically the Nazi's did not succeed in doing.
I like the fact that Auther Low's character points out that it was in fact the Nazi's Britain fought against, thereby indicating that the German people were as much victims as us Brits in World War Two.
As for the comedy aspect of the film, it is improved upon for Columbia pictures. Left to the BBC it would look more amateurish.
Overall, an interesting look at how patriotism via propaganda roused the British spirit during WW2 for the purpose of defence. But what was being defended, and for what purposes, and for whom? These are what begs the questions.