Question: Ovida, Obida or Odiva, was the last Roman ruler of Dalmatia, and a general, of the western provinces, during which late period?

full_context: Document 1: Dagalaifus (Roman Consul, 366): Dagalaifus was a pagan of Germanic descent. In the year 361, he was appointed by Emperor Julian as comes domesticorum (Commander of the Household Guard). He accompanied Julian on his march through Illyricum to quell what remained of the government of Constantius II that year. He led a party into Sirmium that arrested the commander of the resisting army, Lucillianus. In the spring of 363, Dagalaifus was part of Julian’s ultimately-disastrous invasion of Persia. On June 26, while still campaigning, Julian was killed in a skirmish. Dagalaifus, who had been with the rear guard, played an important role in the election of the next emperor. The council of military officers (including Dagalaifus) finally agreed on the new "comes domesticorum", Jovian, to succeed Julian. Jovian was a Christian whose father Varronianus had himself once served as "comes domesticorm".
Document 2: Odda, Ealdorman of Devon: Odda, also known as Oddune, was a ninth-century ealdorman of Devon. He is known for his victory at the Battle of Cynwit in 878, where his West Saxon forces defeated a Viking army led by Ubba, brother of the Viking chiefs Ivar the Boneless and Halfdan Ragnarsson.
Document 3: Ovida: Ovida, Obida or Odiva (died December 9, 480) was a general during the late Western Roman Empire and the last Roman ruler of Dalmatia. He was a Goth, as shown by his Germanic name.
Document 4: History of the Byzantine Empire: This history of the Byzantine Empire covers the history of the Eastern Roman Empire from late antiquity until the Fall of Constantinople in 1453 AD. Several events from the 4th to 6th centuries mark the transitional period during which the Roman Empire's east and west divided. In 285, the emperor Diocletian (r. 284–305) partitioned the Roman Empire's administration into eastern and western halves. Between 324 and 330, Constantine I (r. 306–337) transferred the main capital from Rome to Byzantium, later known as "Constantinople" ("City of Constantine") and "Nova Roma" ("New Rome"). Under Theodosius I (r. 379–395), Christianity became the Empire's official state religion and others such as Roman polytheism were proscribed. And finally, under the reign of Heraclius (r. 610–641), the Empire's military and administration were restructured and adopted Greek for official use instead of Latin. Thus, although it continued the Roman state and maintained Roman state traditions, modern historians distinguish Byzantium from ancient Rome insofar as it was oriented towards Greek rather than Latin culture, and characterised by Orthodox Christianity rather than Roman polytheism.
Document 5: Byzantine Empire: The Byzantine Empire, also referred to as the Eastern Roman Empire, was the continuation of the Roman Empire in the East during Late Antiquity and the Middle Ages, when its capital city was Constantinople (modern-day Istanbul, which had been founded as Byzantium). It survived the fragmentation and fall of the Western Roman Empire in the 5th century AD and continued to exist for an additional thousand years until it fell to the Ottoman Turks in 1453. During most of its existence, the empire was the most powerful economic, cultural, and military force in Europe. Both "Byzantine Empire" and "Eastern Roman Empire" are historiographical terms created after the end of the realm; its citizens continued to refer to their empire as the "Roman Empire" (Greek: Βασιλεία τῶν Ῥωμαίων , tr. "Basileia tôn Rhōmaiōn" ; Latin: "Imperium Romanum" ), or "Romania" (Ῥωμανία ), and to themselves as "Romans".
Document 6: 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 7: Syagrius: Syagrius (430 – 486 or 487) was the last Roman military commander of the Kingdom of Soissons, a Roman rump state in northern Gaul. His defeat by king Clovis I of the Franks is considered the end of Western Roman rule outside of Italy. He inherited his position from his father, Aegidius, the last Roman "magister militum per Gallias". Syagrius preserved his father's territory between the Somme and the Loire around Soissons after the collapse of central rule in the Western Empire, a domain Gregory of Tours called the "Kingdom" of Soissons. Syagrius governed this Gallo-Roman enclave from the death of his father in 464 until 486, when he was defeated in battle by Clovis I.
Document 8: Julius Nepos: Julius Nepos (Latin: "Flavius Iulius Nepos Augustus"; 430480) was Western Roman Emperor "de facto" from 474 to 475 and "de jure" until 480. He was also the ruler of Roman Dalmatia from 468 to 480. Some historians consider Nepos to be the last Western Roman Emperor, while others consider the western line to have ended with Romulus Augustulus in 476. In contrast, the Eastern Roman Empire and its line of Emperors survived this period of history essentially intact.
Document 9: Constitution of the Late Roman Empire: The constitution of the late Roman Empire was an unwritten set of guidelines and principles passed down, mainly through precedent, which defined the manner in which the late Roman Empire was governed. As a matter of historical convention, the late Roman Empire emerged from the Roman Principate (the early Roman Empire), with the accession of Diocletian in AD 284, his reign marking the beginning of the Dominate. The constitution of the Dominate ultimately recognized monarchy as the true source of power, and thus ended the fiction of dyarchy, in which emperor and Senate governed the empire together.
Document 10: Gothic War (535–554): The Gothic War between the Eastern Roman (Byzantine) Empire during the reign of Emperor Justinian I and the Ostrogothic Kingdom of Italy took place from 535 until 554 in Italy, Dalmatia, Sardinia, Sicily and Corsica. Historians commonly divide the war into two phases:
Document 11: Domitian: Domitian ( ; Latin: "Titus Flavius Caesar Domitianus Augustus" ; 24 October 51 – 18 September 96) was Roman emperor from 81 to 96. He was the younger brother of Titus and son of Vespasian, his two predecessors on the throne, and the last member of the Flavian dynasty. During his reign, his authoritarian rule put him at sharp odds with the senate, whose powers he drastically curtailed.
Document 12: Quadi: The Quadi were a Suebian Germanic tribe who lived approximately in the area of modern Moravia in the time of the Roman empire. The only known information about the Germanic tribe the Romans called the 'Quadi' comes through reports of the Romans themselves, whose empire had its border on the River Danube just to the south of the Quadi. They associated the Quadi with their neighbours the Marcomanni, and described both groups as having entered the region after the Celtic Boii had left it deserted. The Quadi are thought to have been an important part of the Suebian group who crossed the Rhine with the Vandals and Alans in the 406 Crossing of the Rhine, and later founded a kingdom in northwestern Iberia.
Document 13: Western Roman Empire: In historiography, the Western Roman Empire consists of the western provinces of the Roman Empire at any one time during which they were administered by a separate independent Imperial court, coequal with (or only nominally subordinate to) that administering the eastern half. Both "Western Roman Empire" and "Eastern Roman Empire" (or "Byzantine Empire") are modern terms describing "de facto" independent entities; however, at no point did the Romans consider the Empire split into two, but rather considered it a single state governed by two separate Imperial courts out of administrative expediency. The view that the Empire was impossible to govern by one emperor was established by Diocletian following the disastrous civil wars and disintegration of the Crisis of the 3rd century, and was instituted in Roman law by his introduction of the Tetrarchy in AD 285, a form of government which was legally to endure in one form or another for centuries. The Western Court was periodically abolished and recreated for the next two centuries until final abolition by Zeno in 480, by which time there was little effective central control left in the area legally administered by the Western Court.
Document 14: Constitution of the Roman Empire: The Constitution of the Roman Empire was an unwritten set of guidelines and principles passed down mainly through precedent. After the fall of the Roman Republic, the constitutional balance of power shifted from the Roman Senate to the Roman Emperor. Beginning with the first emperor, Augustus, the emperor and the senate were theoretically two co-equal branches of government. In practice, however, the actual authority of the imperial Senate was negligible, as the emperor held the true power of the state. During the reign of the second emperor, Tiberius, many of the powers that had been held by the Roman assemblies were transferred to the Senate.
Document 15: Late Roman army: In modern scholarship, the "late" period of the Roman army begins with the accession of the Emperor Diocletian in AD 284, and ends in 476 with the deposition of Romulus Augustulus, being roughly coterminous with the Dominate. During the period 395–476, the army of the Roman Empire's western half progressively disintegrated, while its counterpart in the East, known as the East Roman army (or the early Byzantine army) remained largely intact in size and structure until the reign of Justinian I (r. AD 527–565).
ground_truth: Western Roman Empire