They train soldiers, but again most soldiers, at least citizen soldiers wouldn't live in the barracks I don't think?  But its not completely out of the question.  Would be curious to what people think, and maybe it would be unique to a couple more "agressive" civs.

I really don't know why the first post hasn't to be greenlighted by a mod.

Didn't barracks house soldiers? What if you added like a 10 population bonus to barracks

Full player color: Half player color:  

Another example of skin with gaul clothe's :