Breakaway Romano-British state?

Orsino

Banned
What is the best opportunity to get an independent Roman-British polity that could outlive the western Roman empire by a substantial margin?

Could the Brittanic Empire of Causius have survived in splendid isolation?
 

Orsino

Banned
Carausius is indeed the fella I meant, but I haven't been able to find much information about his empire. It seems like he had a pretty good hold on things, if he avoids assassination would the Brittanic Empire have a better chance of survival?
 
If everything goes well for him, things might last a little. But in Diocletian`s time, the Empire was stabilising itself again, so... also, the Saxons are just around the corner...
 
What is the best opportunity to get an independent Roman-British polity that could outlive the western Roman empire by a substantial margin?

Could the Brittanic Empire of Causius have survived in splendid isolation?

Maybe a British-Roman nobleman with foederati-ancestors pulls a better Syagrius and establishes a functionating realm of relative stability. Some historians claim Artus could have been a 500 AC Romano-British warlord or at least a name as a representative for several people of this kind. Maybe such a leader could ally with Welshmen to successfully repell the Saxon invaders ?
 
Magnus Maximus in the late 4th century would probably have had the best chance, if he had decided to remain in Britain rather than make his attempt to become emperor. At that point Britain is still (probably) one of the more prosperous western provinces, and given his quick successes in Gaul he must have had reasonable forces available in Britannia, perhaps the units assigned to the Comes Britanniae in the Notitia (or similar), plus any reserves/mobile forces assigned to the other two commands. At that time the state of the Western Empire was such that it seems unlikely that any attempt would have been made to dislodge him. Constantinus III in 406/7 might have had a similar opportunity, but again went for Gaul, but by that time the state of Britannia was probably worse and any forces available to him weaker.

So my vote is for Magnus M doing a Carausius.
 

Orsino

Banned
Magnus Maximus in the late 4th century would probably have had the best chance, if he had decided to remain in Britain rather than make his attempt to become emperor. At that point Britain is still (probably) one of the more prosperous western provinces, and given his quick successes in Gaul he must have had reasonable forces available in Britannia, perhaps the units assigned to the Comes Britanniae in the Notitia (or similar), plus any reserves/mobile forces assigned to the other two commands. At that time the state of the Western Empire was such that it seems unlikely that any attempt would have been made to dislodge him. Constantinus III in 406/7 might have had a similar opportunity, but again went for Gaul, but by that time the state of Britannia was probably worse and any forces available to him weaker.

So my vote is for Magnus M doing a Carausius.
By the time of Magnus Maximus is it perhaps already too late for Roman Britain? How would he have fared against Saxon invasions?
 
By the time of Magnus Maximus is it perhaps already too late for Roman Britain? How would he have fared against Saxon invasions?

Maybe negotiate with the Britons, so that they not invite the Saxons and other North Sea Germanic raiders as merchenaries in the first place. On the other hand, they might invite themselves anyway.
 
Maybe negotiate with the Britons, so that they not invite the Saxons and other North Sea Germanic raiders as merchenaries in the first place. On the other hand, they might invite themselves anyway.

Inviting barbarians to settle territory for land wasn't a novel approach, though; it was a tried and true Roman practice.

One advantage Carausius may have given the Britons is experience with self-rule. In OTL you didn't seem to have many Roman senators from the province, and instead a province that felt disaffected and perpetually restive. That might change in ATL.
 
The main issues with revolts in Late Roman Britain were that they weren't secessionists at all, but tentatives to claim the imperial dominance over Romania, or at least a very important part of it.

Just as the so-called Gallic Empire wasn't a sign of a Gallo-Roman proto-nationalism, if Carausius's Empire was more successful it would have gone for Gaul and other parts of western Romania.

At best, you'd have a de facto division of the Empire in different ensemble either as during the IIIrd century crisis, probably (eventually) as a more divided post-Tetrarchy Romania. But that wouldn't be remotely looking as a Romano-Britton state, but as a Roman polity in western Romania including Britain.

Eventually, the big problem with Late Roman Britain is its relative backwardness compared to other provinces of the Empire, its political divisions (tribal structures still largely existed, and mixed a lot with roman administratives structures, up to largely influencing them).
A true Romano-Britton polity would certainly be post-Imperial, and more looking like sub-Roman Britain ensemble.

These, in particular, may have a better chance to survive than IOTL.

After the roman withdrawals (407 was basically the last drop), you didn't have a roman army to speak of, meaning no general, critically when early Vth century WRE was far from being "beyond repair" (it really began being so by the mid and latter part of the century).

Saxons didn't pop up and conquered all the island the moment the province was abandoned
(altough they probably were present along the Saxon Shore as settled coastguards), and while the provincial structures vanished (being based on imperial authority) the Britto-Roman cities/tribes were maintained and formed entities of their own.

Having, however, an unified entity defining itself as Roman isn't much likely. You had only a more or less superficial sense of romanity in the Southern cities, and virtually absent from half of the province.

We know that they were unifying commands (I'd tend to argue they were more regional and circonstantial than pan-Briton : as Vortigern for the Cantium), at least military-wise : Riothamus/Ambrosius Aurelianus (possibly the same person) is an exemple. So the problem isn't having unifying features, but to make them last against the various and conflicting identities.

It doesn't seem, for instance, that the Old North kingdoms had a much develloped sense of commonity, after that Coel Hen/Caelius Votepacus died. (Altough that might be a good PoD).

Now, I think it's possible to have a maintained high-kingship (pretty much as in Ireland, Wales or Scotland) in some regions. Giving the not that much unified Anglo-Saxon kingdoms, it does have a chance to lives on and leading to a wanked *Wales. I don't know enough to definitely name a candidate or a most likely place (while I think that you can forget about North Sea regions); but the bonus point is that you don't even need a Britton or being totally hostile to Germans to have such.

Cerdic of Wessex may be the most obvious exemple of a mix of Britto-Romans and Barbarian elements in the Vth century (you have other ones). It wouldn't surprise me if you could have a Britto-Roman high-king, supported by the Saxons of the Litus managing to lead a more or less unified (in a first time : again, high-kingship didn't looked much as a really united structure) Britto-Roman kingdom.

Anyway, the survival of one or two Britton states (one in the North, the other in the South-West?) that would keep more of areas more touched by Roman influence could survive as post-Imperial entities.
 
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