I'm assuming if its required to form Rome to begin with its considered a core part of the hegemony. And to be fair to North Africa, it was the main source of grain to Italy before the conquest of and alongside to an extent Egypt later on. So it did play a important role.
Having Carthage again would be pretty big
But at numerous times it wasnt part of the empire
These are reasons for it to not be part of china's de jure hegemomy
If you want sinicisation to be a consideration for the hegemony, youd need to add alot more than just korea
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There wasn't a numerous times. The rule was near continuous between the conquest by Emperor Wu of Han till the end of the Tang Dynasty. For more than 1,000 years. The period of interruptions in between never lasted more than a few decades at most, during times when China itself was usually divided. No major dynasty failed to have control of Vietnam in between.
Being a part of someone's hegemony means that you acknowledge them as the hegemon and culturally, politically see them as a superior. It does not mean that you have to an actual part of them. Vietnam matched all the criteria.Legally speaking, the Vietnamese kings' legal status as kings also depended heavily upon acknowledgement by the Emperor of China. So de jure they were actually 'part' of it even if not in fact.
Realistically they should add it.
Technically speaking on Emperor's no, Emperor is the highest tier traditionally. Strictly speaking a hegemon is just a dominant state or power in an area for example in ancient Greece Sparta and Athens were often hegemons of greece. the devs seem to treat it as a tier above emperor but irl its just a term meaning "dominant power in a given area"
I'm obviously speaking about the in-game hegemons, not IRL ones like the US.
I kinda doubt there will be any such mechanic for hegemonies generally but we have seen some references to various states around China having a unique type of tributary relationship, perhaps this could be one of the things it models? Maybe not an outright veto but if the emperor of China refuses to accept a given ruler of a neighboring state it might have serious negative consequences for their legitimacy
Merely a few rebels like Trung Sisters' rebellion, which continues only for 3 years, except it there're only legends. Vietnamese is not very different with Hmong, Zhuang or Yi people, some minorities of China, even closer to Chinese culture, but it gained independent in the history
No one knows pre-history because of its lacking of recording, so it's okay to say "since", at least in the trusted history, Vietnamese are always our siblings until it got independent
Maybe they went with the duchies coz duchies were rigid? Kingdoms are subject to de-jure shift, same with empires, but duchies used to stay the same throughout the game?
What happens if you turn the relevant titles into titular ones?
Honestly I can't stand titular titles, as-is they just feel intensely wrong, I think because in most cases there's no way to restore them if they break?
I dare to say no one would like to see Vietnam transferred from China Empire to Cambodian Empire, even Vietnamese theirselves
The solution is obvious, Vietnamese Empire (perhaps form able by decision)
Historically, the monarchs of Vietnam did the same thing as you think: they claimed to be a kingdom under the Chinese Empire when dealing with the Chinese, but within the country border they called themselves "南朝", which means another Chinese Empire in the south, and at the end of the Qing Dynasty, Vietnam officially make it clair that it had seceded from China and became an independent empire, and their country name was "大南帝国", which means Great Southern Empire
Also, in CK2 "restoring the Roman empire" was only a decision for Byzantium (it required the Byzantine Empire to be your primary title); it wasn't an option for the HRE or anyone else. It was introduced in the "Legacy of Rome" DLC, after all.
We don't actually know yet what being a "hegemony" means, in-game. Just that it's a title above emperor, and will presumably have some special mechanics.
There is no China Empire, unified China is hegemon tier, there are qin, liang, shu, wu, and yue as empires in China currently. We await to see if paradox caves for everyone getting their own hegemony, whether vietnam is put under an indochinese wide hegemony or something else.
But can the decision still be taken if the duchies are titular?
And before it was conquered by the Han? Or between the Tang and the Ming? Were those merely a few rebels?
Saying theyre not very different to other groups, who themselves are not chinese, and speak a language unrelated to chinese, you're not giving a good reason to include them in the hegemony
"Always our siblings" sounds more like chinese nationalist rhetoric than actual history
