most things have been said so i wont repeat them, but here is a lil' comment on what you said:
the soldiers are on Canadian soil (as announced by the captiontext) and it is a Canadian soldier that he shoots in the back of the head. the combat armor and helmet placed next to his right knee should be a giveaway...Salkinius said:Hell, just look at that funny intro vid from the first game where a US soldier shoots a civ (from the looks of it) in the back of the head and then waves to the camera. Granted that the civ most probably isn't a US citizen and they aren't on US soil, but never the less, we know the effect the Vietnam war, with all it's atrocities, had on the population in US.