TIL about Simo Häyhä, a Finnish military WWII sniper who has the highest number of sniper kills in any major war (believed to be over 500). When asked if he had any remorse he replied "I did what I was told to do, as well as I could. There would be no Finland unless everyone else had done the same."
https://en.wikipedia.org/wiki/Simo_H%C3%A4yh%C3%A4
