As you may or may not have been aware, AOTR has a wiki (link on main page) which provides documentation for the mod's units, campaigns, factions etc. It is looking good but more work is needed.
The wiki is administered by a small group of dedicated contributors. We're active on the AotR discord if you want to talk to us there. The current crew do a lot but ultimately we could do with more assistance from the community, aka, you.
If you would like to help out please just go ahead and do so. Please review the editing guidlines, ask us if you have any questions, and then just pick your area of interest and get started.
You'll have to make an account with your email address, but its a very quick job.

Thank you in advance if you do choose to help.