The Usato Mountains, located in the central part of Kantadar, serve as the central divider of the Kingdom between the north and south, and a natural barrier for the Capital for hundreds of years.
Depending on the terrain of the mountains, two impregnable and treacherous mountain passes were established in the north and east of the King's Domain, known to be indestructible and impregnable for a thousand years.
If the Orland army wishes to invade the Ustato Kingdom, theoretically, the only way is to detour and march into the plains and valley entrances to the southwest.
In reality, however, this is almost an impossible notion, as the King's Domain "corridor" of the southwest path is already the heartland of Kantadar.