"The King of the North Sea," Oleg, was indeed the strongest pirate in the North Sea, and his fleet possessed the power to crush nearly any force in the North Sea.
But he didn't actually have dominion over all the forces in the North Sea, especially the four countries of the northern continent.
To pirates, power was far less important than wealth, and previously, everyone had lived in peace. After all, pirates also need fertile ground for survival; even the strongest tree can't destroy the very earth that nourishes it. Many of the pirates recruited by the North Sea Fleet were citizens of the four countries.
But now that Oleg had suddenly become a "king," the situation had begun to change.
Upon seeing the act of "taxation," Su Lun guessed that Oleg probably wanted to start proclaiming sovereignty and taste what it's like to be a true lord.