The whistle of Versailles armed area is spread from the thunder tower on the white ancient castle of the Academy of science and technology. It can be heard in any corner of the armed area.

generally speaking, the Versailles armed area doesn't emit this kind of urgent whistle sound, especially disturbing people's dreams at night. After all, the Versailles armed area doesn't rely on the outside of the wasteland, so it's basically difficult to have devils here!

of course, there are also several times when there are demons outside Milan. Of course, they are all killed by the strong.

when I heard the whistle, all the soldiers under the rank...