Not 1943 *One Spoiler*
I don't know why the box and the ads for this movie say it takes place in 1943.... the movie starts off with '1945' on the bottom of the screen when he is on the train heading to basic, and at the end of the film he makes note that the war ended before they had a chance to get shipped out.
If it was 1943, they would have been trained and shipped overseas within a matter of months for certain... wouldn't take 2 years for it at all, or anything even close to it