@Classic-Burger Please don't spam 4 posts in a row, there is an Edit button.  Also, back when forums were the golden grail of internet discussions, that was called post-farming. Another thing, you should calmly collect your thoughts before posting anything. For example, you are constantly calling 0 A.D. a clone of Age of Empires. While that may be true in general part, it's a fact that this game has some unique features not present in Age of Empires. Features like Citizen Soldiers and capturing, Even the lack of a feature can be feature. For example, the lack of clear unit upgrade paths. Once again, as an author of this thread, don't spam post. It looks really bad and it makes me scroll more. 

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I'll repeat it again in case it wasn't clear. I don't want them to be trained already made, like wow said. I don't want the entire battalion to be trained all at once.See video above. I want them to be trained based on the current formation. "Rise cohort". What would happen if that were the case? Some things would change; the life bar would go from being individual to group, therefore there would also be a defense bonus. I haven't yet investigated how it works this way, apart from what I said above. Group life bar. However, I don't like how the battle plays out in Praetorians. Watch the video above and notice that it gets messed up and they don't maintain the line. https://youtube.com/shorts/-CKWsq2RMyo?si=bVSRa-gY_JOPWoRz     "Same problem" as in 0 A.D.

What I want is for them not to get disorganized.   (I left videos above) and if they get disordered, they gradually return to their original position.   Another difference would be: if I take two battalions together, they shouldn't mix. That's different from formations.In formations, if I select 2 groups, they become a single group when I move them.   For now, I have two ideas. The first one will require a lot of programming. For now, that's nothing complex in terms of realism. Note that I am not asking for flanking festures and other things. And no, I don't want units with moral system. Friendly fire maybe...

I think you need to modify the engine. I'm not sure.