The gaia civic centers at the Danubius map from D204 are currently more a decoration and besides some treasure and territory,
there is no incentive to destroy the fortification.
It would be much more entertaining if units would spawn there too and patrol at the map border.
The proposed patch implements that by reusing the existing attacker composition function for ships, not adding rams.
To not make it unfair to the closest player to the CC, the units don't attack the closest enemies but only patrol.
Since all players have about equal territory, they should be attacked with equal probability.
If the CC is destroyed, there are no more waves spawning from there.
Gates were aded to the other sides of that wall.
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