Upgrade your base!

This is an objective! ■ You should upgrade your base. Upgrading gives you more power ■ Injured citizens will arrive in your base sometime later. You should take them as residents! ■ Take care of your residents. Not giving them food or water will decrease their sanity and may harm you. ■ Warning! bandits may approach at night after 8:00 pm, Make sure you build security towers and watchtowers to defend from the bandits! ■ Barricades are a must!