Aaron is now at the Fort Last Bastion.
It means access to dungeons is nil. If one wants to hunt and level up, they have to go outside to do so. It was not like this before. There were a few high-level dungeons present here for the soldiers to improve themselves.
When the monster horde attacked, those dungeons were lost.
The monsters destroyed the access to those dungeons, while they destroyed the fort.
Normally, the dungeons are protected from sabotage, but when the fort fell, those protective formations went down, and so did the dungeons.
For now, no new dungeons have been placed here. It means everyone has to go out to level up. Levelling was not a problem, but for the Rank Quest, Aaron needed a dungeon, and there were none at the fort.
It was a problem that he couldn't tackle for now, and could only do so later on, either by delving deep into the wild to search for dungeons or returning to the academy to use one of the dungeons.