Struggle for Hegemony Through Dynasties in Another World

He, a history teacher who retired from the special forces, was swept into another world by a once-in-a-thousand-year time and space storm. He originally wanted to become a marquis successor in peace and contentment. But the reality is often cruel. The stepmother's cold eyes, the elder brother's jealousy, the destruction of the dynasty, and the invasion of foreign races. Let's see how he can stabilize the world and unify the dynasty. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.