In the "leading land to shore", there were mountain ranges that separated the states, and different states could not be crossed directly. There would be a checkpoint at every set distance in the mountain range. If one wanted to go to other states, they would have to break through the checkpoint first.
The level of the checkpoints was relatively high and couldn't be cleared in the early stages. It required dozens of people from the Alliance and hundreds of troops to clear it. After that, they would be able to enter the neighboring state.
However, breaking through the pass also meant a declaration of war and an invasion, which would inevitably cause the other party's resistance. The two sides often had to fight for a long time near the pass.
However, if the Alliance master did not resist at all like Xu Prefecture, the progress of Qingzhou and Yangzhou would be very fast. They might even divide the entire Xu Prefecture within a few days.
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