Talk:Parthian Tactics/@comment-27202541-20161017184312/@comment-37753396-20181224054534

Yes that part is unclear in the game menu of the Archery Range. Only after researching I found that it increased attack against Pikemen by +4

HCA already have a base attack bonus against Pikemen of +2 so a fully upgraded HCA does 2+4+11 =17 attack vs Pikemen

and 13 damage per hit vs a FU Halb (because pierce armor = 4)