The useless Adou takes on the assembled ministers in debate from the start and makes Hanzhong the capital!
Three Kingdoms + transmigration + power struggles + turning the tide
In the twenty-fourth year of Jian'an, Liu Bei captures Hanzhong and is made King of Hanzhong, bringing Shu Han to the height of its power.
Yet Liu Shan, newly named heir apparent, breaks into a cold sweat.
He has gained a set of modern memories, and knows exactly what catastrophe lies hidden beneath this flourishing age, bright as a fire burning hot enough to boil oil!
Guan Yu will suffer defeat and flee to Maicheng. Zhang Fei will be murdered by his own officers. Liu Bei will burn his enemies' supply camps. Shu Han's elite forces are about to be wiped out!
As the assembled ministers celebrate, the twelve-year-old Liu Shan steps forward.
This isn't a new book, I think I've already read it once.