A Symbol of Hope

First, he outlined that his army must not simply sweep through the Three Kingdoms. He did not want to raze it all down. 

His aim to conquer is not motivated by some desire to exploit the people of the Thirteen tribe. Instead it is motivated by a glorious purpose.

He wanted to fulfil the destiny that he was prophesied to fulfil. It is a quest of redemption. Saving these people is his redemption.

He did not wish to create casualties that is more than necessary. He wanted to save them and not kill them

And a stable empire could never be built on a foundation of pillaging. The economy of the Three Kingdom is very…. primitive.

But it could be slowly established. He did not need to rush like what he did in Davarus. He could slowly take his time

For now, he tries to maintain the status quo. He did not execute all of the nobles of the state of Balhae. 

Those who could be used would be used. Those who could not be used would be replaced.