Su Yen stopped their campaign after the six states surrendered to his reign.
The Six states were so massive that they couldn't be covered in a day. With the Spirit Plan, it would take three days from the Barren Land to reach the 31st state.
And the Spirit Planes at their fastest speed could travel at Mach 15. Still, to cover the farthest state would take them three days.
Now, if they were to continue their campaign to the other stage states, how long would it take them to send their men to the states?
Moreover, in times of emergency, they wouldn't be able to render help immediately.
With this, the suspension of the campaign came as a relief to everyone.
Even though they were not expanding their, the six state was large, and many states had yet to explore the land in their territory.
Sitting inside the Spirit Plane, five state governors looked at the strange artifact in amazement.