Legio XXII Deiotariana was a legion of the Imperial Roman army, founded ca. 48 BC and disbanded or destroyed during the Bar Kokhba revolt of 132–136. Its cognomen comes from Deiotarus, a Celtic king of Galatia. Its emblem is unknown.
Legio II Traiana, was a legion of the Imperial Roman army raised by emperor Trajan, along with XXX Ulpia Victrix, for the campaigns in Dacia. Records of the II Traiana Fortis have been recovered from Egypt dating to the middle of the 5th century. The legion's emblem was the demi-god Hercules.
Legio III Cyrenaica, was a legion of the Imperial Roman army. The legion had its origins among the forces of Mark Antony during the civil wars of late first century BC. In the Imperial period it was stationed in Egypt, where it played a key role in campaigns against the Nubians and Jews. In the first century AD, it was usually located in Arabia Petraea. There are still records of the legion in Syria at the beginning of the 5th century. The legion symbol is unknown.
Legio III Parthica was a legion of the Imperial Roman army founded in AD 197 by the emperor Septimius Severus for his campaign against the Parthian Empire, hence the cognomen Parthica. The legion was still active in the Eastern provinces in the early 5th century. The legion's symbol was probably a bull.
Legio II Parthica was a legion of the Imperial Roman army founded in AD 197 by the emperor Septimius Severus, for his campaign against the Parthian Empire, hence the cognomenParthica. The legion was still active in the beginning of the 5th century. The legion's symbol was a centaur.
The gens Flavia was a plebeian family at ancient Rome. Its members are first mentioned during the last three centuries of the Republic. The first of the Flavii to achieve prominence was Marcus Flavius, tribune of the plebs in 327 and 323 BC; however, no Flavius attained the consulship until Gaius Flavius Fimbria in 104 BC. The gens became illustrious during the first century AD, when the family of the Flavii Sabini claimed the imperial dignity.
The Theban Legion figures in Christian hagiography as a Roman legion from Egypt —"six thousand six hundred and sixty-six men" — consisting of Christian soldiers who were martyred together in 286, according to the hagiographies of Maurice, the chief among the Legion's saints. Their feast day is held on September 22.
The limitanei, meaning respectively "the soldiers in frontier districts" or "the soldiers on the riverbank", were an important part of the late Roman and early Byzantine army after the reorganizations of the late 3rd and early 4th centuries. The limitanei, unlike the Comitatenses, palatīni, and Scholae, garrisoned fortifications along the borders of the Roman Empire and were not normally expected to fight far from their fortifications.
The comitatenses and later the palatini were the units of the field armies of the late Roman Empire. They were the soldiers that replaced the legionaries, who had formed the backbone of the Roman military since the late republic.
A vexillatio was a detachment of a Roman legion formed as a temporary task force created by the Roman army of the Principate. It was named from the standard carried by legionary detachments, the vexillum, which bore the emblem and name of the parent legion.
Legio V Macedonica was a Roman legion. It was probably originally levied in 43 BC by consul Gaius Vibius Pansa Caetronianus and Gaius Julius Caesar Octavianus. It was based in the Balkan provinces of Macedonia, Moesia and Dacia. In the Notitia Dignitatum records from beginning of the fifth century, the legion was still stationed in Dacia, with detachments stationed in the east and Egypt.
The Legio I Maximiana was a comitatensis Roman legion, probably created by Emperor Diocletian in 296 or 297 AD. The legion was named after Maximianus, a colleague of Diocletian. The I Maximiana was formed together with II Flavia Constantia, to garrison the newly created province Thebaidos, in Aegyptus. As well as protect it from neighboring tribes. Since no Legio I Maximiana is listed as being stationed at Thebes in the Notitia Dignitatum, the designation is interpreted more broadly as of the Thebaid in general. The legion is also known as Maximiana Thebanorum or Thebaeorum. The cognomen Maximiana originated from Maximian, Diocletian's colleague.
Legio III Diocletiana was a comitatensis Roman legion, levied in 296 by Diocletian, from whom the legion took its name. The aim of this unit was to guard the newly re-organized province of Aegyptus, being based in Alexandria. It was created to support II Traiana Fortis, and thus it took the numeral III.
Legio I Iovia was a Roman legion, levied by Emperor Diocletian (284–305), possibly together with II Herculia, to guard the newly created province of Scythia Minor. The cognomen of this legion came from Diocletian's attribute Iovianus, "similar to Jupiter". According to Notitia Dignitatum, at the beginning of the 5th century I Iovia was still in its camp on the Danube. The legion may have even survived the fall of Rome and continued to serve the Byzantine empire.
In modern scholarship, the "late" period of the Roman army begins with the accession of the Emperor Diocletian in AD 284, and ends in 480 with the death of Julius Nepos, 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 remained largely intact in size and structure until the reign of Justinian I.
Legio V Parthica was a legion of the Roman Empire garrisoned in Amida, Mesopotamia, established by the Roman emperor Diocletian (284–305), who reorganized the eastern frontier. The legion is described by the historian Ammianus Marcellinus. The cognomen "Parthica" was an archaism, as the Parthian Empire was already replaced by the Sasanian Empire at the time of the establishment of the legion.
The Geopolitics of the Roman Empire deals with the "inalienable relationship between geography and politics of the Roman Empire". Once the Roman Empire had reached its natural borders, the location of potential threats to the empire and Roman troop locations played a major role in the elevation of Roman Emperors. Access to the troops, their location were crucial to the empire's internal politics, civil wars, and the eventual Fall of the Western Roman Empire.
Legio I Flavia Constantia was a Roman legion, mentioned in the Notitia Dignitatum as a comitatenses unit stationed in the Eastern Empire.
The Legio I Illyricorum was a Roman Legion stationed in Qasr el-Azraq and Palmyra; it is mentioned in the Notitia Dignitatum. According to many ancient sources, it was stationed within the Eastern Half of the Roman Empire, under emperor Aurelian.
