I traveled through hundreds of worlds at once

A huge city built of stones stands on a wasteland more than 100 kilometers from the border of the empire.

Compared with the northern city where most of the residents are ordinary civilians, the residents of this city, both men and women, are all tough under the cold.

The fortress city, the capital of the northern aliens, is also the only city with a permanent population of more than 300,000 for the northern aliens who make a living by hunting and animal husbandry.

More than 70% of the residents are soldiers recruited by the northern aliens to invade the empire.

Rather than saying that this is a city, it is better to say that this is a city for invading the south.