Question: Manduessedum was a Roman fort in a province inhabited by Celtic Britons, Belgae, and what other people group?

full_context: Document 1: Copston Magna: Copston Magna is a small village and civil parish in the Rugby borough of Warwickshire, England. It is located around 9 miles northwest of the town of Rugby, 6 miles southeast of Nuneaton, and 1.5 miles east of the larger village of Wolvey. It is also located close to the ancient site of High Cross, on the border between Warwickshire and Leicestershire, where the Roman roads of Watling Street and Fosse Way cross each other. In the 2001 Census, the parish had a population of 38. At the 2011 census population details were included with Wolvey
Document 2: Britannia: Britannia was a Roman-Britain province inhabited by the Celtic Britons, Belgae and Picts, encompassing parts of the island south of Caledonia (roughly Scotland) of the geographical region of Great Britain and is the name given to the female personification of the island. It is a term still used to refer to the island. The name is Latin, and derives from the Greek form "Prettanike" or "Brettaniai", which originally designated a collection of islands with individual names, including "Albion" or Great Britain. By the 1st century BC, "Britannia" came to be used for Great Britain specifically. The Romans had initially called the entire provincial island "Britain" and it was only when the island was split into four provinces that two were given the name "Britannia". Although Britain had been designated part of the Roman Empire in 43 AD during the conquest of emperor Claudius it wasn't until the end of the 2nd century that Britannia had been pacified and fully adopted Roman practices.
Document 3: Albion: Albion (Ancient Greek: Ἀλβιών ) is the oldest known name of the island of Great Britain. Today, it is still sometimes used poetically to refer to the island. The name for Scotland in the Celtic languages is related to Albion: "Alba" in Scottish Gaelic, "Albain" (genitive "Alban") in Irish, "Nalbin" in Manx and "Alban" in Welsh, Cornish and Breton. These names were later Latinised as "Albania" and Anglicised as "Albany", which were once alternative names for Scotland.
Document 4: Roman province: In Ancient Rome, a province (Latin: "provincia", pl. "provinciae") was the basic, and, until the Tetrarchy (293 AD), largest territorial and administrative unit of the empire's territorial possessions outside of Italy. The word "province" in modern English has its origins in the term used by the Romans.
Document 5: Province: A province is almost always an administrative division, within a country or state. The term derives from the ancient Roman "provincia", which was the major territorial and administrative unit of the Roman Empire's territorial possessions outside Italy. The term province has since been adopted by many countries, and in those with no actual provinces, it has come to mean "outside the capital city". While some provinces were produced artificially by colonial powers, others were formed around local groups with their own ethnic identities. Many have their own powers independent of federal authority, especially in Canada. In other countries, like China, provinces are the creation of central government, with very little autonomy.
Document 6: Bewcastle Roman Fort: Bewcastle Roman Fort was a Roman fort, built to the north of Hadrian's Wall as an outpost fort and intended for scouting and intelligence. The Roman name for the fort was Fanum Cocidi (as recorded in the Ravenna Cosmography), and means 'The Shrine of Cocidius', a deity worshipped in northern Britain. The remains of the fort are situated at the village of Bewcastle, Cumbria, 7 mi to the north of the Roman fort at Birdoswald, on Hadrian's Wall.
Document 7: List of castles in Greater Manchester: There are nine castles in Greater Manchester, a metropolitan county in North West England. They consist of four motte-and-baileys, three fortified manor houses, an enclosure castle, and a possible shell keep. A motte-and-bailey castle has two elements, the motte is an artificial conical mound with a wooden stockade and stronghold on top, usually a stone keep or tower. A bailey is a defended enclosure below the motte, surrounded by a ditch. Motte-and-bailey castles were the most common type of castle in England following the Norman Conquest. A shell keep was a motte with a stone wall rather than a wooden stockade on top; there would have been no tower within the walls. Four of Greater Manchester's castles are Scheduled Ancient Monuments: Buckton, Bury, Radcliffe Tower, and Watch Hill. A Scheduled Ancient Monument is a "nationally important" archaeological site or historic building, given protection against unauthorised change.
Document 8: Hen Ogledd: Yr Hen Ogledd (] ), in English the Old North, is the region of Northern England and the southern Scottish Lowlands inhabited by the Celtic Britons of sub-Roman Britain and the Early Middle Ages. Its denizens spoke a variety of the Brittonic language known as Cumbric. The Hen Ogledd was distinct from the parts of northern Britain inhabited by the Picts, Anglo-Saxons, and Scoti as well as from Wales, although the people of the Hen Ogledd were the same Brittonic stock as the Picts, Welsh and Cornish, and the region loomed large in Welsh literature and tradition for centuries after its kingdoms had disappeared.
Document 9: Camulodunum: Camulodunum ( or ; Latin: ' ), the Ancient Roman name for what is now Colchester in Essex, was an important town in Roman Britain, and the first capital of the province. It is claimed to be the oldest town in Britain. Originally the site of the Brythonic-Celtic oppidum of Camulodunon (meaning ""The Stronghold of Camulos""), capital of the Trinovantes and later the Catuvellauni tribes, it was first mentioned by name on coinage minted by the chieftain Tasciovanus sometime between 20 and 10 BC. The Roman town began life as a Roman Legionary base constructed in the AD 40s on the site of the Brythonic-Celtic fortress following its conquest by the Emperor Claudius. After the early town was destroyed during the Iceni rebellion in 60/1 AD, it was rebuilt, reaching its zenith in the 2nd and 3rd centuries. During this time it was known by its official name Colonia Claudia Victricensis (" "), often shortened to Colonia Victricensis"', and as "Camulodunum", a Latinised version of its original Brythonic name. The town was home to a large classical Temple, two theatres (including Britain's largest), several Romano-British temples, Britain's only known chariot circus, Britain's first town walls, several large cemeteries and over 50 known mosaics and tessellated pavements. It may have reached a population of 30,000 at its height. It wasn't until the late 18th century that historians realised that Colchester's physical Brythonic (British Celtic) and Roman remains were the city mentioned in ancient literature as "Camulodunum".
Document 10: Celtic Britons: The Britons, also known as Celtic Britons or Ancient Britons, were Celtic people who inhabited Great Britain from the British Iron Age into the Middle Ages, at which point their culture and language diverged. They spoke the Common Brittonic language, the ancestor to the modern Brittonic languages.
Document 11: Catuvellauni: The Catuvellauni were a Celtic tribe or state of southeastern Britain before the Roman conquest, attested by inscriptions into the 4th century.
Document 12: Manduessedum: Manduessedum or Manduesedum was a Roman fort and later a civilian small town in the Roman Province of Britannia. Today it is known as Mancetter, located in the English county of Warwickshire.
Document 13: Carvetii: The Carvetii were an Iron Age people and were subsequently identified as a "civitas" (canton) of Roman Britain living in what is now Cumbria, in North-West England.
Document 14: Middlesex: Middlesex ( , abbreviation: Middx) is a historic county in south-east England. It is now entirely within the wider urbanised area of London. Its area is now also mostly within the ceremonial county of Greater London, with small sections in other neighbouring ceremonial counties. It was established in the Anglo-Saxon system from the territory of the Middle Saxons, and existed as an official unit until 1965. The historic county includes land stretching north of the River Thames from 3 mi east to 17 mi west of the City of London with the rivers Colne and Lea and a ridge of hills as the other boundaries. The largely low-lying county, dominated by clay in its north and alluvium on gravel in its south, was the second smallest county by area in 1831.
Document 15: King of the Britons: The title King of the Britons (Latin "Rex Britannorum") was used (often retrospectively) to refer to the most powerful ruler among the Celtic Britons, both before and after the period of Roman Britain up until the Norman conquest of England. The Britons were the Brittonic-speaking peoples of what is now England, Wales, and southern Scotland, whose ethnic identity is today maintained by the Welsh, Cornish and Bretons.
ground_truth: Picts