Is this area under my organization's control?
Your organization needs to be in control of the area you are trying to build in before you can place a tower there. Your organization is considered to be in control of the area if any of the following conditions apply.
1. If the area you are in has never been colonized.
2. Immediately after your organization has won a notum war.
3. When 20 minutes have passed since some other organization has won a notum war and has not taken advantage of the opportunity to build a controller (and if it was not your organization that lost).
4. If one hour has passed since your organization lost a notum war.
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Land Control Towers