Question about

Hello, I'm ather new to modding AoM and I'd like to ask a quick question:

I've experimenting with damage bonuses for a mod idea I've had for a while. My question is twofold: The first part is what file manages the <unittypes> such as "HumanSoldier" and "MythUnit" that the protoX.X.xml files uses as reference.

Second: Is it possible to add new unittype entries to said file if available in the first place?

Thank you.