Constantine of Britannia: What if Roman Britain Survived?

The Roman Empire was quickly unravelling at the start of the 5th century. In 410, the city was sacked for the first time in 800 years. Though it was only a minor sacking, the psychological effect upon the people throughout the Empire was enormous. People have often wondered how the Empire could have survived, or what the world would be like if it did. But today, let's imagine what it would have been like if one person had made very different decisions.

Disclaimer:
We all know history is incredibly complex, and the choices people make are made for a host of complex reasons. The daily choices you and I, not to mention our political leaders, make each day are often made because we are reacting to the circumstances we are facing in the world around us. We don’t have the luxury of looking into the future, and responding with decisions that could lead to the best outcome available. That would be no different for someone living in ancient Rome as he saw his world crashing around him. But for the sake of this video, let's assume our Roman friend was making the best choices he could have made, given the situation he found himself in.

Setting
In 406 Germanic tribes crossed the Rhine and invaded the Western Roman Empire. In Roman Britain, 6000 men were stationed, but hadn’t been paid in a number of years, and were prone to rebellion. Naturally, they began to revolt and proceeded to go through a number of leaders before settling on Flavius Claudius Constantinus. He was a common soldier, not an officer, so his standing wasn’t strong. But in February 407, his fellow legionnaires proclaimed him Emperor.

Rebellions were common in Roman Britain, and the standard practice of a rebellion was to establish a local power base, invade mainland Gaul, make a move on Italy, and hopefully if you are lucky, or incredibly skilled, take Rome. This format had been practised by none other than Constantine the 3rd’s namesake, Constantine the Great, with great and lasting success. But Constantine the 3rd was not that great of a leader. His reign lasted for a few years, fighting a number of battles in Gaul and Italy, before he was killed in battle in 411, a year after the sack of Rome.

But what if Constantine had learned from those mistakes of earlier rebellions and instead of gathering his forces and abandoning Britain to protect Gaul? He instead forms his power base in Londinium (London) and establishes his own Senate as a copy of the Roman one and prepares to defend Britain from the Goths from the south, and from the Picts in the north. This could be an unpopular move among his troops, as Britain isn’t seen as an independent island nation for another 600 years, and is still very much regarded as a part of the Roman empire. Plus, the people in Roman Britain view themselves as Roman and wouldn’t view themselves differently than their fellow Romans living in Gaul, Spain, or Italy. Many of his troops had come from all over the empire and would have been stationed in Britain under orders from higher up, and would have wanted to protect their homes from what was happening over the Channel. Constantine would have had to be very skilled, and give concessions to his troops if he was going to be able to establish himself in Britain. He could have made his officers the heads of the new Senate and given them land for their loyal service. If he wanted to avoid looking like he was separating from Rome, he could have declared himself “Caesar” which was a step down from the title “Augustus”, and declared his loyalty to Honorius, the Roman Emperor. This would have given the impression that he wasn’t breaking away from Rome, but was establishing a defence of Roman Britain. Honorius was in no position to retaliate, given that, in our timeline, he ceded the defence of Britain to itself in 410.

So Constantine chooses to; instead of invading Gaul, consolidates his power by establishing a Senate made up of his officers, gives them land, and titles, and his soldiers are given voting rights for a lower house. This satisfies them and they proceed to train and build up an auxiliary force that can help defend the country when raids come. The Picts and Irish have been raiding from the north and west and have taken over Wales, Northumbria, and northwestern England. Constantine begins building fortifications and taking back control of land given over to the Celts. He does this until he has reconquered the whole of Roman Britain up to Hadian’s Wall. Here, he is able to make a settled peace with the Picts for the rest of his reign. He spends time building up the cities, and towns, building ships and developing trade with Mainland Europe. Trade and immigration increases as Britain is seen as a peaceful remnant of the Roman Empire, drawing Romans from all over Gaul to come and escape the constant invasions across the Rhine.

To be continued.....
 
So Londonium is the New Rome?

Does C3 have bride with imperial lineage in mind for himself or his heirs? Someone that can help solidify his claim to be the continuation of the Empire?
 

Henry1066

Banned
What about he giving/taking lands in otl in England and Wales and giving them to his supporters like with what happened with the first three Norman kings of England

With in a generation or two the new nobility would see Britannica as home

But like with the Eastern Roman Empire and particularly justinian they may look to restore the old Empire by invading otl France like emperor justinian did not Africa and Italy

There is also the picks and Scots to the North which I believe the Rome's could defeat and came close a few times but the emperors prevented any general

From winning that glory

If I remember correctly the Anglo-Saxons are they offshoot of the future Vikings and that part of them came from Denmark

They invaded and attached Britannica for over 60 years and established petty Kingdoms

So there a strong possibility they won't be move out side of Britannica for 100 years

And if the Rome's can keep the population of 5 million then that a bigger boom as well
 
So Londonium is the New Rome?

Does C3 have bride with imperial lineage in mind for himself or his heirs? Someone that can help solidify his claim to be the continuation of the Empire?
C3 in otl has a son named Constans II. He was a monk who was called upon by his father to be his successor and eventually co-emperor and given a wife to start a dynasty. In TTL, he'll by a very similar character.
 
What about he giving/taking lands in otl in England and Wales and giving them to his supporters like with what happened with the first three Norman kings of England

With in a generation or two the new nobility would see Britannica as home

But like with the Eastern Roman Empire and particularly justinian they may look to restore the old Empire by invading otl France like emperor justinian did not Africa and Italy

There is also the picks and Scots to the North which I believe the Rome's could defeat and came close a few times but the emperors prevented any general

From winning that glory

If I remember correctly the Anglo-Saxons are they offshoot of the future Vikings and that part of them came from Denmark

They invaded and attached Britannica for over 60 years and established petty Kingdoms

So there a strong possibility they won't be move out side of Britannica for 100 years

And if the Rome's can keep the population of 5 million then that a bigger boom as well
There will be something like that in TTL but with a different focus on securing "Briton" as an island nation from German invasions. Eventually, the influence Roman Briton will have on the continent will be due to trade, and it's historical connection to the Western Roman Empire. There will be minimal Anglo-Saxon influence here, due to the Romans maintaining a military presence and building up a local auxiliary force.
 

Henry1066

Banned
There will be something like that in TTL but with a different focus on securing "Briton" as an island nation from German invasions. Eventually, the influence Roman Briton will have on the continent will be due to trade, and it's historical connection to the Western Roman Empire. There will be minimal Anglo-Saxon influence here, due to the Romans maintaining a military presence and building up a local auxiliary force.
Just so you remember which I am sure you do there is no Germany and gearms as we know them

There are just the tribe including the Frank's

In Northern France there is the Rome successor state that was distroyed by Clovis of the medavengine Dynasty

It makes sense that the Rome, Anglo-Saxons, Danes, norwegiance culture would change Britain and the Rome Armies would change to different demands

And if the state losers it's centralisation and civil service the armies would get smaller

During hundred years war French armies where around 25,000 men with the English around 14,000

There is also the politics at home as well if the focus on gaining continental Holdings then the army would be bigger

If it's trade and defence it would be the navy
 
There are some cool potential secondary PoDs here.

Big one, boy named Patricus never gets kidnapped and sold into slavery in Ireland and grows up a well adjusted member of the Briton Upper Class without life and death issues that drive him to piety, introspection, and sympathy for the downtrodden.

Considering the otl Britons mocked him for such attitudes, I could see the unique circumstances that created such a missionary saint not coming about.

Maybe the parents of people who in otl were big in the Dominion of Saissons are Brits instead.

Saxons and Franks and Frisians oh my!
 
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Just so you remember which I am sure you do there is no Germany and gearms as we know them

There are just the tribe including the Frank's

In Northern France there is the Rome successor state that was distroyed by Clovis of the medavengine Dynasty

It makes sense that the Rome, Anglo-Saxons, Danes, norwegiance culture would change Britain and the Rome Armies would change to different demands

And if the state losers it's centralisation and civil service the armies would get smaller

During hundred years war French armies where around 25,000 men with the English around 14,000

There is also the politics at home as well if the focus on gaining continental Holdings then the army would be bigger

If it's trade and defence it would be the navy
Yes, I'm aware of the fractured nature of the Germanic tribes. The 5th Century in Northern Europe is chaotic and confusing, and I'm going to use the concept of a Roman Briton to help change some of that. The Franks AFAIK don't really come into the picture until about 500, and aren't really unified until later. So they wouldn't be the primary issue for C3 and Constans 2. Their issues are recapturing the territories from the Picts and the other Celts that were abandoned in the 380's, and maintaining a unified Roman identity on the Island in the midst of the chaos on the Continent. Briton trade and expansion come later, but it takes a long time.
 
There are some cool potential secondary PoDs here.

Big one, boy named Patricus never gets kidnapped and sold into slavery in Ireland and grows up a well adjusted member of the Briton Upper Class without life and death issues that drive him to piety, introspection, and sympathy for the downtrodden.

Considering the otl Britons mocked him such attitudes, I could see the unique circumstances that created such a missionary saint not coming about.
Missionaries and especially monasticism be very much in play TTL. The monasteries were the foundation for learning and study throughout the Middle Ages OTL, but these monks will have the added benefit of records kept from the late and middle Roman periods. This will give Briton an advantage going forward.
 
Part 2: Roman Briton At Peace
Constantine and the Roman Britons still see themselves as part of the Roman Empire, and as successive Roman Emperors rise and fall on the mainland, he contents himself with pledging his loyalty to the closest and most powerful claimant to the throne to avoid having to fight to protect his jurisdiction. He builds up the Briton Navy, and completes coastal forts to protect against any raids from the Goths across the sea. This practice will continue among his successors which will save them from the Huns.

Given the protection the legions and auxiliaries provide the island, the Angles and Saxons aren’t able to take a foothold in the eastern half of the country, and Britain experiences a peace throughout the 5th century in a time of rampant invasion and conquest in mainland Europe. This allows cities to grow, and towns to flourish. The Caesars, Constantine and his successors, are patrons of the Monasteries, where rigid record keeping, learning, and experiments are practised. The Monasteries become houses of worship and learning, with young men encouraged to spend at least one year to develop their intellectual and religious practices. Roman Britons are given good education, military training, and are much wealthier and healthier than their mainland counterparts.

By 476, when the last Western Augustus, Romulus Augustulus, ceeds his crown, Constans III, the grandson of Constantine III, is able to claim the title, Roman Emperor. Briton is now strong and independent. Over the next few centuries, her people live in peace with all the comforts that the Romans had brought with them, including aqueducts, sewers, watermills, and baths. The Britons develop a series of canals powered by waterwheels and windmills to move goods around the country at reduced costs. Monks and friars meticulously record the information and technology developed which is then used by the ruling class. This growth and prosperity on the island is contrasted on the mainland by constant wars and successive invasions and a decline in cities and in the general population.

Briton is able to use its own power base by trading with the various Germanic kingdoms that now dominate Western Europe. Far from the reach of Constantinople, Briton uses numerous ships that have been built to help project power and wealth throughout the North Sea trade routes. Coastal trading towns develop along the northern shores of Flanders, Holland, Fries, and Jutland. The Romans have the upper hand in exploiting these trade routes as they have the largest ships, the best sails, and the most sailors. Ships are modified and sailing practices are improved to help increase the speed and the distance sailors can travel. Fishing and whaling methods are improved in the North Sea. This leads to further exploration of new trade routes and fish stocks. This will lead to sailors exploring further and further out into the open seas.
 

Henry1066

Banned
So would they be classed as Augustus or emperor just because the tital went from first citizen to emperor as we understand it today in the modern definition

For example the word Duke comes from the governor of a Roman province which uses to be Ducks and I am definitely getting that name wrong

The big Difference between Britannica and the continent of Europe particularly western central Europe the state would stay centralized

I also with the Weastern Rome emperor or emperor of Britannica being limited to the British isles they would not have the same precious of Roman emperors and their contemporaries in the eastern Roman Empire

Which lead to assassinations, usurping the throne and other pressures of ruling a large Empire

The emperor ruling from otl London being something like House of the Dragons kinglanding would lead to a stable Rome-Britain Dynasty which the Rome's never really achieved

England had swamp plans dominating East Anglia, and the same separating Northern England from the Midlands

Was was not solve until the English canal system was built

Wales and Scotland in terms of lands is poor for growing crops but his great fit cattle farming and was a source of conflict with the Highland clans

It could be a future reason why an emperor may look to take otl the island of Ireland

The Norman and Plantagenet Kings never too control of the island due to being preoccupied with continental affairs

And the nobility viewed Island as a backwater due to being culturally French

If the Rome state is worried about food security and maintain a sizeable fleet to feed it's growing port settlements and capital London then Ireland will be easy target

There is also the future Flander's

As for the future you could have the emperor justinian or a future version of the historical figure

Reaching out to the emperor of Britannica

The great tournament grounds of constance the forth
 
Without C3 attacking Gaul the Western Roman Empire would be in a better position going forward, combine that with a lack of many raids in Northern Gaul and the whole area is much safer and more prosperous. Cooperating to keep the Channel 'Roman' would stop any significant raids from getting farther improving the security of the Western Gaulish coast. Britain would remain a good trade partner for the rest of the Empire raising the amount of taxes available. It might also serve as a useful place of 'exile' for troublesome military officers, nobles and the like who would get 'assigned' to serve in Britain and then get 'rewarded with some land on the frontier they will have to spend all their time keeping from falling into Pict hands or just getting killed'. Given all of this I imagine that the West would have lasted decades longer at the very least.

Further, a Caeser based solely in Britain will need military victories to burnish their political capital with the new Senate and the easiest way for Romans to do that would be conquest. Advancing north up to the Antonine Wall by 476AD is the minimum amount of land likely to be taken given the new generations of officers will want estates of their own and the other option of invading the continent. The example of Septimus Severus will only goad them on.
 
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Henry1066

Banned
@Benhur88 , sweet chapter!

Can't wait to see Roman britain encapsulate the whole of the british isles!
It depends what is the goal of the new regime and are they focus on not no conquest and war there line is too easily ended

So they could be playing it save for the first Hundred years so people get used to taking orders from them
Without C3 attacking Gaul the Western Roman Empire would be in a better position going forward, combine that with a lack of many raids in Northern Gaul and the whole area is much safer and more prosperous. Cooperating to keep the Channel 'Roman' would stop any raiders significant raids from getting farther improving the security of the Western Gaulish coast. Britain would remain a good trade partner for the rest of the Empire raising the amount of taxes available. It might also serve as a useful place of 'exile' for troublesome military officers, nobles and the like who would get 'assigned' to serve in Britain and then get 'rewarded with some land on the frontier they will have to spend all their time keeping from falling into Pict hands or just getting killed. Given all of this I imagine that the West would have lasted decades longer at the very least.
I can agree with what you are saying just depends on how willing or able the regime in Britannica it to follow orders from Rome

You could have the Roman empire in Britannica taking control of the independent successor state in northern Gaul

There is also Anglo-Saxons, Juts, Scots and other different groups invading and migrating to Britannica so they have no interest in engaging in other wars
 
It depends what is the goal of the new regime and are they focus on not no conquest and war there line is too easily ended

So they could be playing it save for the first Hundred years so people get used to taking orders from them
I hope that once they are truly their own people they look at the rest of the island and ireland and think of expansion to be whole.
 
My thought is that from what I've read of GDP calculations for the empire... England was one of the poorest regions. Did it have the wealth to support 6000+ legionairres??
Yea, that was a challenge to think through, but the way I see Constantine3 working it out is that he gives his officers large land grants to satisfy them, similar to the Marian system 500 years earlier, and within those larger land holdings, the regular soldiers are given smaller land grants according to their unit. This would give the men property and and income to help them survive the initial few years. As the years go on, Constantine 3 will have gained enough income from tariffs to pay his soldiers a pension. The auxiliaries are given a smaller bonus for their service.
 
So would they be classed as Augustus or emperor just because the tital went from first citizen to emperor as we understand it today in the modern definition

For example the word Duke comes from the governor of a Roman province which uses to be Ducks and I am definitely getting that name wrong

The big Difference between Britannica and the continent of Europe particularly western central Europe the state would stay centralized

I also with the Weastern Rome emperor or emperor of Britannica being limited to the British isles they would not have the same precious of Roman emperors and their contemporaries in the eastern Roman Empire

Which lead to assassinations, usurping the throne and other pressures of ruling a large Empire

The emperor ruling from otl London being something like House of the Dragons kinglanding would lead to a stable Rome-Britain Dynasty which the Rome's never really achieved

England had swamp plans dominating East Anglia, and the same separating Northern England from the Midlands

Was was not solve until the English canal system was built

Wales and Scotland in terms of lands is poor for growing crops but his great fit cattle farming and was a source of conflict with the Highland clans

It could be a future reason why an emperor may look to take otl the island of Ireland

The Norman and Plantagenet Kings never too control of the island due to being preoccupied with continental affairs

And the nobility viewed Island as a backwater due to being culturally French

If the Rome state is worried about food security and maintain a sizeable fleet to feed it's growing port settlements and capital London then Ireland will be easy target

There is also the future Flander's

As for the future you could have the emperor justinian or a future version of the historical figure

Reaching out to the emperor of Britannica

The great tournament grounds of constance the forth
Yea, I'm loving a lot of these extra idea's you're giving me. My idea for the canal system is that the Romans did have some watermills and small canals throughout their empire. Constantine3 and Constans 2 are aware of these technologies and will do their best to take advantage of a peaceful period on the Isles to build up the canal system far sooner then OTL. This like OTL will lead to a huge boost in localized trade due to the cost benefits of trading over water. This leads to the expansion of foreign trade. The peaceful nature of the reigns of Constantine 3 and Constans 2 lead to a stable political landscape and a well established dynasty.
 
Without C3 attacking Gaul the Western Roman Empire would be in a better position going forward, combine that with a lack of many raids in Northern Gaul and the whole area is much safer and more prosperous. Cooperating to keep the Channel 'Roman' would stop any raiders significant raids from getting farther improving the security of the Western Gaulish coast. Britain would remain a good trade partner for the rest of the Empire raising the amount of taxes available. It might also serve as a useful place of 'exile' for troublesome military officers, nobles and the like who would get 'assigned' to serve in Britain and then get 'rewarded with some land on the frontier they will have to spend all their time keeping from falling into Pict hands or just getting killed'. Given all of this I imagine that the West would have lasted decades longer at the very least.

Further, a Caeser based solely in Britain will need military victories to burnish their political capital with the new Senate and the easiest way for Romans to do that would be conquest. Advancing north up to the Antonine Wall by 476AD is the minimum amount of land likely to be taken given the new generations of officers will want estates of their own and the other option of invading the continent. The example of Septimus Severus will only goad them on.
In OTL, Honorius was a pretty terrible emperor who only made a bad situation worse. He gave up completely on trying to reclaim Britannia because he was in no position to do anything about it. Plus, it was his vacillating nature that led to the sacking of Rome in 410. Later, the Vandals invaded and got as far as North Africa. I'm not sure that changes if Constantine stays in Britain. Honorius' best move was actually recognizing Constantine3 as Co-Emperor, and that is an important point for my timeline. If Constantine 3 had only stayed in Britain, Honorius would have probably still recognized him.

Constantine 3's political capital comes from creating the Senate, and giving the Senators the land grants, once he has reconquered the northern parts of Roman Britain up to Hadrian's wall. Those are the military victories that he needs to establish himself.
 
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