The location of the Green Valley Secret Realm was in a deep mountain outside Aquilopolis City, not far from Aquilopolis City; it only took about two hours to get there by car.
Outside the entrance of the secret realm, the Eagle Federation military had built a fortress there, which was listed as a military restricted area, with soldiers stationed there all year round to guard the entrance of the secret realm.
Every soldier responsible for guarding the entrance of the secret realm was also a Beast Master, generally a Two-Star Beast Master, with the highest-ranking officer being a Three-Star Beast Tamer.
The reason for arranging soldiers to guard every secret realm entrance was to prevent the secret realm from suddenly undergoing changes, which could cause the secret realm entrance to open.
Allowing a large number of demon beasts inside the secret realm to run out, causing uncontrollable events, and threatening human lives and the safety of the city.
