Northern River Border is situated at the apex of this triangle.
Now, all sixteen outposts within the triangle behind it have fallen into the hands of the Demon Race.
Northern River Border has become a solitary city.
If unwilling to abandon Northern River Border, once the Demon Race launches another attack, Northern River Border will find itself in a dire situation with enemies on all sides, unable to call for help.
The cultivators of Northern River Border would be essentially forfeit.
It's clear that the Human Race couldn't do something so foolish.
Thus, they retreated decisively and swiftly.
In the end, it might seem like Northern River Border "fell," but there's a substantial difference.
Giving it up voluntarily differs significantly from being conquered by the Demon Race.
Besides, Northern River Border hasn't vanished.
The Human Race quickly constructed a new fortress at the base of the triangle previously formed by the seventeen outposts.
