Alliance depot

Cost of the 1st level:

20 00040 000 CRP 2
The alliance depot provides the ability to communicate with friendly fleets that help with the defense of the planet and are in medium orbit. The higher the level of the development, the more players can defend you with an unlimited number of fleets at the rate of 1 building level = 2 players.
Comparison by level
Lvl The number of allies in defense
1 2
2 4
3 6
4 8
5 10
6 12
7 14
8 16
9 18
10 20