The second reason was simple. There were four citadels near the capital of the Leon Empire. These four citadels were like guards that guarded the capital of the Leon Empire. They weren't far from the capital of the Leon Empire, and they could arrive in a day if they were fast. In other words, if Zhao Hai started a war in the capital of the Leon Empire, he would only have one day. If he couldn't break through the capital of the Leon Empire in one day, he would be attacked from both the inside and the outside.
The first of these four defensive cities all had 100000 soldiers, and they were all cavalrymen. Although they weren't the elite cavalry of the Leon Empire, they weren't easy to deal with.
