Legend of the Three Dukes

Grandpa had two younger brothers. His third younger brother was the one we called Third Granduncle. He was seventy-five years old and often told us stories about his youth. He would say, "That was fifty years ago! Back when I was young, taking on a dozen men at once was nothing..." As I listened, I somehow fell asleep. When I woke up, I discovered I had transmigrated, arriving fifty years in the past, when Third Granduncle was young...