Auto defense of account activates in Defense settings.
Bridges are not built against the attacks from accounts which are connected to a bot.
Creation features of automatic bridges:
Auto defense is effective if the quantity of the attacked habitats does not exceed 50% a total quantity of all habitats connected to AltaBot. The more accounts are under control of AltaBot, the defense of your empire will be more reliable.
After execution of the task and return of all units at home, the bridge will be deleted automatically.