I grew up to love history. And read mythologies like the Mahabharata and always glorified wars. I was like 13-14.
It was written in the newspapers that war was bad, my History teacher taught us so, and my father always told me so. But I never bought those. To my early teenager tiny-brain, war was something glorious where you fought for your country/clan. And killing other people effectively was fabulous!
This all came to change when I played Call of Duty (1). It is set in WW2. There were so many deaths! And those deaths were so horrific! I had a sort of an epiphany that each corpse (and there were a lot) lying in there is somebody's brother, son, lover, and so on. And they were dead. Quotes about war was flashed across screen after each "mission".
There was a church scene and so many people died there. The condition was so horrific. I realized for the first time in my life that war so horrific and always a bad thing.
Very few transformations in very few persons' lives are dramatic. But this was exactly as I write. Call of Duty (1) taught me to hate wars. I grew up to be a person to whom wars are a very bad thing.
Especially for the people who have to fight.
I loved to play Call of Duty but decided that wars are cool only in games. Not in real life.