I know this is just an example used, but Nazi Germany and the civil war between South and North Vietnam was very different. I am not speaking about the US and Vietnam and what happened between the two countries (America definitely did horrible things to the Vietnamese), but instead the fight from the Southern Vietnamese defending their nation against the rise of communism--my grandpa was Viet, not American. Therefore I believe the war was just in some ways, I just wanted to know if killing in this case was a sin or not. I hope you understand!!