In fact, Zhao Hai didn't know that these three chariots weren't here to Scout. They were heading north of the ark continent for one purpose-to see if they could find the people on the ark continent or to see if they could figure out why the people on the ark continent had left. They weren't just heading north. They had also sent out a convoy to the front, but many of the convoys would wander around the Leon Empire and not reach the stupa Empire because they didn't have enough supplies.
That was why Zhao Hai didn't pay attention to the fleet heading south. Instead, he focused on the fleet heading north. According to Zhao Hai's calculations, the fleet heading north would reach the undead creatures of the underworld faster than the fleet heading south. He wanted to see how they would react.