Los incas del siglo III d.C., al igual que varias ideas del mod, me hicieron cuestionar ciertas cosas jajaja

It would need to be balanced a little, but not too much. Rise battalion, Rise Cohort, Rise Horde etc...

What? One battalion of champions would destroy several battalions of CS. Which is why battalions would need to be a togglable feature, similar to grouping in AoE1. Just in a proper formation. You'd select a group of units that is eligible to form a battalion and you'd click on a "Form Battalion" button (or use a hotkey). Now, any time you select one of the units in a battalion, you will select an entire battalion. Similarly, with a battalion selected, you would click on a "Disband Battalion" button to un-group the units. It's simple in theory, but the implementation will be more complex (as will be adding any bonuses to units in a battalion).

Sorry, I was in a hurry. I mean that, at the moment, a champion unit can fight off a few citizen soldiers, and look cool. But a battalion of champions fighting several battalions of units looks less cool, and makes champs seem less important and special. Hyrule Conquest units are only cannon fodder because of the battalion system, as you would see if you were to compare HC to my remake of it (which is using the same damage and health values most of the time). Battalions also mean that civs should start with a battalion, so then why is there only in building to start… and it would mean removal of Citizen Soldiers, or wasting your troops, as you would have to order an entire battalion to gather resources or build a house.

Okay, but that was H:C, not 0 a.d.  0 a.d doesn't have cannon fodder units. H:C did. And your criticism sounds nonsensical. A battalion of Champions would look "overwhelmed" by armies of battalions? What does this even mean? How is this a coherent criticism?   I mean, yeah...