Although Zhou Tian understood this principle, he was not pleased. Despite his discontent, he chose to withdraw his forces when he obtained half the Dragonman Tribe's territory and received the desperate call for aid from other defense lines.
That said, Zhou Tian did not hide his frustration while withdrawing his forces.
When pulling out from the Dragonman Tribe's territory, Zhou Tian didn't leave much of his army behind. To put it bluntly, he redirected most of his troops to other defense lines without hesitation.
Zhou Tian chose to do this primarily because the Dragonman Tribe had been heavily defeated and currently lacked ample military strength to retaliate against him. At the same time, after redirecting a part of his forces, the intense battles on Zhou Tian's other frontlines could be slightly alleviated.