What did your grandparents do in WWII?

My dad's dad was an air gunner and on his deathbed he told me that he killed innocent villagers in Burma, he felt bad about it but it was treason to not carry out orders.

I don't like this but I'm ok with his thinking process. I think I'd probably do the same thing.

I like to think I'm principled but I'm not interested in being jailed as a traitor to my country.