While there must be thousands of stories, I’ll give you one.
This was John Singleton Mosby- the “Gray Ghost” Commander of the 43rd Virginia- Mosby’s Rangers. American Civil War, In HIGHLY unconventional war, used a numerically MUCH smaller force to raise hell with the Union Army, Never captured, never surrendered. As an old man, he spent time as a honored guest of friends in Virginia.
They had another guest- a young boy that was the son of some other friends. He loved to visit, and talk with the Colonel about battles during the war, and sketch out military actions and tactics.
Cute little boy, huh? Folks had quite a laugh with the 6 year old talking tactics with the 60 year old veteran. They were SO serious about it. When the little boy grew up, he decided he wanted to be a soldier. He was quite a fencer, and a pistol shot.
His name was George S. Patton.