What would you think if you were a general and a great man who punished evil and promoted good, hated evil and fought in the battlefield in your last life?

Have you heard the song "Once the King"? It's similar to your question. I don't believe in past lives, but I believe in causal reincarnation. Good and evil are rewarded. The generals in Song Dynasty retired from the Jianghu when they were old. Maybe he feels guilty. After all, he has killed people and killed so many brothers. This war is so unfair to those people! Killing others, living alone, living so lonely. There is no next life. If there is, it can only be goodbye, just a stranger.