It has been so long since doing this, I don't remember how to do that either. There are several good tutorials on youtube, BI forums, reddit, steam guides. I know I had to reference them to do some things.

Yo, anyway you can help me understand how I would be able to put a custom faction as blufor or op for?

No problem, I've encountered same in the past. In my case I make a "modlist" in the launcher with my usual, unload all mods, load only those required, and test. Then I re-enable the mods in batches of 10s till I have an error. Then I try to zero in on which of those 10 caused the error. If that helps.

Ah, then its probably another mod that is overlapping with the mission files, thank you for testing it out. Now I know its a problem from me.

I just tested it again to make sure it wasn't a fluke. Loaded it up with Fallujah V1.2 and CBA_A3 along with Fallujah V1.2's dependencies, Cups Terrain Core and Cups Terrain Maps. Started a MP server and selected the scenario.

Role selection came up, which was not the case without CBA_A3. Started the game, was prompted to select the first point to attack, AI started calling in squads and fast traveled to the first point after voting ended.

After both teams took the first point and started on the second I figured it functions as expected. Didn't play all the way through to the the last point as that takes more time than I currently have.

Thank you for the response but I already had CBA_A3 loaded, are you sure its working for you?

It appear that I did not realize that I had CBA_A3 loaded when I made the mission, and apparently it is now required for the mission to function. I may go back and fix it later, but for now I've added it to the required items list.

Not starting. Going to Multiplayer > Lan > start new session > select Fallujah, select 12v12 mode, click play and nothing happens. I have all the mods required for this mod so its not an issue from my side.

@L-Broskie what does it do or not do?

Not working, broken.