Thanks for the answer. The sample was just randomly pick and I forgot what that was.

I was actually interested in the "Pahlava and Baktria Cataphract Duel". I found that the Attack Point for Pahlavan Elite Cataphract and Baktria Hetairoi Cataphract are the same. However, Pahlavan Cataphract does not have "ap" attribute but the lethality was 0.225, while Baktrian Cataphract have "ap" but lethality was only 0.1. That was a pretty big difference, which led me wonder the contribution of this "lethality" value in actual combat. This value was very uniform for infantry, but they frequently differ by several fold for cavalries.