From Wiki Grepolis
|At Level 25|
|Phalanx||Your troops form a powerful phalanx and thus fight 10% more strongly.||4000 4000 15000 9|
Basically, this research allows your land units to be more powerful.
- This works the same in defense and offense.
- Phalanx does not affect the fighting capability of naval units.
An offensive army of 1000 slingers has 23000 attacking power (Distance).
With Phalanx, the slingers receive a 10% bonus to their fighting capabilities.