Ah! William just realized something!
Since the time of the reign of the former king, Ronan's father made the road connecting Thebis to Wolgast in the Northendell area. So, many merchants and travelers chose to use the land route.
And later, Ronan continued to strive for development in the border area. People from Thebis who wanted to go to Wolgast preferred to enter the North first rather than through the neutral area canal, which did not have legal certainty.
"Wasn't my decision to build a border area the right one?" asked Ronan to the people behind him.
"Yes, Your Majesty," replied an advisor who had been following the king's long discussions about border development in recent years.
"Losing a diamond mine isn't a problem either, is it? They don't give us taxes or tribute either. They're not part of us. We have more income from people passing through our area."
William nodded in understanding now.