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When the door is closed , your enemy can only face your armies by conquering. There is some pros and cons closing the door. The Pros is you can avoid your armies from facing other players maraud. Most of the players like to maraud players to gain siege points but don't want to risk conquering because they don't want to face the fortification.So closing the door will prevent losing your troops. Here's the Cons, when you close the door, players can maraud your resources easily without facing your troops. Players cannot maraud gold from other city. They must conquer in order to get gold from the city. A city can only be marauded once per 24 hours.
So choose , losing troops or losing resources.
As for me , i prefer closing the doors.


When the door is closed , your enemy can only face your armies by conquering. There is some pros and cons closing the door. The Pros is you can avoid your armies from facing other players maraud. Most of the players like to maraud players to gain siege points but don't want to risk conquering because they don't want to face the fortification.So closing the door will prevent losing your troops. Here's the Cons, when you close the door, players can maraud your resources easily without facing your troops. Players cannot maraud gold from other city. They must conquer in order to get gold from the city. A city can only be marauded once per 24 hours.
So choose , losing troops or losing resources.
As for me , i prefer closing the doors.