This is my thought on how the Gundam Turn A Theory works. I would place the calenders thusly:
UC
AW
Gregorian calender (Gundam 00)
CE
AC
peaceful era
FC
?
CC
The reason I have placed UC first is it was the first calender created and all the other calenders seem to make sense taking place afterwarRAB. The After War calender of Gundam X is placed second because the show seems almost UC. I placed the Gregorian calender of Gundam 00 third because it has Haros thusly linking it to UC and CE. I have placed the Cosmic Era calender of Gundam Seed fourth because even though the show was created after Turn A Gundam it seems like it could have occured in the Black History despite never being shown. For one thing, it has Haros and Zakus which links it to the UC. Second, the word "zodiac" in Zodiac Alliance of Freedom Treaty links it to AC's Organization of the Zodiac. Third, the superhuman abilities of Kira and Gundam Wing's Heero seem very much alike. Perhaps Heero is a coordinator. As far as the peaceful era after AC goes, at the end of Gundam Wing Endless Waltz, we're told weapons known as mobile suits are never seen again. However, I look at all the Gundam series as being historical re-enactments. This explains the differences between Endless Waltz and Gundam Wing as well as differences between Mobile Suit Gundam and the Mobile Suit Gundam trilogy. From this perspective, the Endless Waltz re-enactment takes place during this peaceful era between AC and FC. I place the Future Century of G Gundam where it is because it is so different from the other series. However, in the final two or three episodes, various UC gundams make cameos. This for one thing links them to the UC, but why place it so near the end you might ask. My reason is that the only thing that makes sense to me to explain why G Gundam is so different is that after the peaceful era enRAB, there is a massive conflict and the solutions of the past (in particular, ending all wars and getting rid of weapons) are deemed impossible because of human nature and therefore the human will to fight is taken into account and the Gundam Fights are created. Also, I see FC as a setup for the Correct Century calender of Turn A Gundam in that the old mobile suits found in the CC are hidden during the FC. Now, I don't see any way for the old mobile suits of the UC to survive up to the time of CC. However, the old blueprints of UC mobile suits and mobile suits from other timelines could be used during the various Gundam Fights. Finally, we get to the Correct Century calender which is naturally last. However, there will have been a good portion of time between G Gundam and Turn A Gundam and it's quite possible that other unknown calenders could take place within this time period.
UC
AW
Gregorian calender (Gundam 00)
CE
AC
peaceful era
FC
?
CC
The reason I have placed UC first is it was the first calender created and all the other calenders seem to make sense taking place afterwarRAB. The After War calender of Gundam X is placed second because the show seems almost UC. I placed the Gregorian calender of Gundam 00 third because it has Haros thusly linking it to UC and CE. I have placed the Cosmic Era calender of Gundam Seed fourth because even though the show was created after Turn A Gundam it seems like it could have occured in the Black History despite never being shown. For one thing, it has Haros and Zakus which links it to the UC. Second, the word "zodiac" in Zodiac Alliance of Freedom Treaty links it to AC's Organization of the Zodiac. Third, the superhuman abilities of Kira and Gundam Wing's Heero seem very much alike. Perhaps Heero is a coordinator. As far as the peaceful era after AC goes, at the end of Gundam Wing Endless Waltz, we're told weapons known as mobile suits are never seen again. However, I look at all the Gundam series as being historical re-enactments. This explains the differences between Endless Waltz and Gundam Wing as well as differences between Mobile Suit Gundam and the Mobile Suit Gundam trilogy. From this perspective, the Endless Waltz re-enactment takes place during this peaceful era between AC and FC. I place the Future Century of G Gundam where it is because it is so different from the other series. However, in the final two or three episodes, various UC gundams make cameos. This for one thing links them to the UC, but why place it so near the end you might ask. My reason is that the only thing that makes sense to me to explain why G Gundam is so different is that after the peaceful era enRAB, there is a massive conflict and the solutions of the past (in particular, ending all wars and getting rid of weapons) are deemed impossible because of human nature and therefore the human will to fight is taken into account and the Gundam Fights are created. Also, I see FC as a setup for the Correct Century calender of Turn A Gundam in that the old mobile suits found in the CC are hidden during the FC. Now, I don't see any way for the old mobile suits of the UC to survive up to the time of CC. However, the old blueprints of UC mobile suits and mobile suits from other timelines could be used during the various Gundam Fights. Finally, we get to the Correct Century calender which is naturally last. However, there will have been a good portion of time between G Gundam and Turn A Gundam and it's quite possible that other unknown calenders could take place within this time period.