Isn't It About Unifying the Continent?

Travel through another world, inherit the city lord, and obtain the exchange system If I have money, I can trade it for soldiers. If I have money, I can trade it for buildings. If I have money, I can also exchange it for military commanders and counselors from all over the world. As a rich person, I can have whatever I want. A certain king: Where did he get the soldiers? Help him! A certain dynasty: What kind of country is this from the past? Why is it so cruel? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.