Core Buildings

City Hall
The city hall is the essential biding of your settlement. Upgrading it increases the maximum level of other buildings and it will affects your overall strength. When you tap the city hall, you are able to see "Boosts" and "Settlement Review" of your city.

There's important levels for city hall:
 * Level 7, you can upgrade your sandbox to level 7 now, which means you can have extra 1 officer in your formation
 * Level 9, you can upgrade your Headquarters to level 9, adding one more formation to your army

Upgrade Resource Needed
Food is a basic resource in the wasteland, you can get it from your farms, plundering other's settlement, attacking monsters, joining events, buying from shops etc.