Cost of the 1st level:CRP 4
The head of the alliance can convert the moon into a bank station that collects taxes from alliance members and tribute from everyone else in the alliance. The desired taxes are set by the head, but the maximum percentage of tax is limited to the level of the bank divided by 2. The percentage of tribute is half of the bank's level. It can only be built by the head of the alliance and automatically becomes the center of the alliance network. As the alliance can withdraw resources from the bank no more than once a week, it is a tidbit for the enemies.