City
From Sons of Valhalla Official Wiki
Resources to upgrade the city can be obtained by defeating enemies. In addition the city will receive 150 Hack Silver, 25 Food and 25 Wood at regular intervals.
At both ends of the city are gates, which block enemy access. Cities may also have watchtower lookouts, which allow up to 5 ranged units to garrison them.
New buildings can be constructed at material piles. Buildings can only be repaired or upgraded if there are no enemies nearby.
All buildings except the Mead Hall have 25 HP per level.
Between cities there are outposts, which unlock a mercenary and enable fast travel between the outposts and Thorald's city.