I mean like wasn't there speculation of which series (the ones outside UC) take place after/before in regards to UC. You have UC where you have the earth pretty much ruling the colonies while in at least G Gundam you have the colonies being the ones in charge, that's AC right? I forgot which one it was. Maybe I'm just crazy.
I read that it was supposed to be a series and I think it really shows since not many characters get a chance to develop and you just get things thrown at you without any sort of break.
UC - You know.
Future Century - G Gundam - Colonies Rule and decide the governing body with the Gundam Fights.
After Colony - Wing - Earth Sphere has the Colonies under their thumb, but Colonies fight back and by the end of AC they Unify.
Mars Era - Wing - First brand new Era to be created with in another century that already had it's own era that I'm aware of. Centers around Mars and the Earth President seems crazy as fuck. Colonies seem really chill and for the most part want to stay out of it it seems.
After War - X - Seen alot of fans debate that Compture/Spirit/New Type essence at the end of the show is in fact Amuro Ray. I don't really buy into it, but interesting none the less.
Correct Century - Turn A - All of the above (plus some people say Bandai tries to retroactivily make OO and SEED part of it) combine to form this universe there for linking all the Gundam Time lines into one.
The real problem is there is serious issues with linking any of the time frames without using the Turn A itself to wipe out each timeline and then it makes it pointless beacuse they don't matter where they fall.
As it is, Turn A and Turn X have Devil Gundam Genes inside them so alot of people like to think that G Gundam would be the last, and coming right before Turn A.
If we look at UC and how the mech and overall design of that universe flows then it would seem natrual for Wing or X to follow UC. X if things go wrong and then leading into Wing or Wing should things continue to advance (mobile suit design, power, size's are all things that could if followed in a direct line hook UC to Wing,) however the problem is for each and every arguement made there are several that would discredit and ruin the idea of a proper timeline starting with UC and leading into CC.
This is why despite Turn A having a cult following, the Black History/CC isn't something that has caught on more because the amount of problems it brings up by it's very use.
The most common timeline I've seen people use goes like this.
Universal Century -> After War -> After Colony/Mars Era-> Future Century-> Turn A's creation-> Moonlight Butterfly gets used -> Correct Century