Consolidation and establishment of administration Illyricum was divided into
Dalmatia (initially called Illyricum Superius) and Pannonia (initially Illyricum Inferius) in 8 or 9 AD. According to
Suetonius, with the
Bellum Batonianum, Tiberius finally defeated all peoples between the Danube and the Adriatic Sea. No Illyrian resistance is known after this, not due to the natives' compliance with the new
status quo, but due to their extreme exhaustion. The eligible Pannonian youth were conscripted and commanded to other provinces. The communities taking part in the uprising were afterward relocated and organized into
civitates under military supervision. The military occupation of Pannonia may have been carried out in gradual steps. The Romans felt it necessary to resettle certain tribes to the territory of the peoples north of the Drava, which, for them, had no economic, but strategic significance. Augustus formed a kind of alliance where the Romans would act as supervisors, and it was not until his death (14 AD) that
legions would be moved over from South Pannonia. The second emperor Tiberius () founded multiple
coloniae in the province and developed its road network. However, due to these land's unsuitability for cultivation, it was a hard task to persuade veterans to comply with settling there, and he had to silence a mutiny right when assuming power. He sent his son
Drusus Julius Caesar to create tranquility and depose Maroboduus, who needed Roman support for his war against
Arminius. This ultimately caused the rise of
Vannius (20 AD), who ruled over an extended realm. It was
Claudius () who finished Pannonia's occupation and began to construct of the local
limes. Systematic integration into the Empire accompanied by the establishment of settled Roman life progressed subsequently. In 50 AD, Vannius was overthrown by
Vangio and Sido, who enjoyed the emperor's support. By this date, the nomadic
Sarmatian population of the
Iazyges had taken possession of the
Danube–Tisza Interfluve, helping the Romans by being a
buffer state against the dangerous Dacians. At first, the primary goal of the Roman administration was the conclusion of the barbarian conflicts outside the province. In
Nero's time () as many as 100,000 barbarians were moved from Pannonia to Moesia by
Plautius Silvanus Aelianus, and 50,000 may have been settled in Pannonia by
Tampius Flavianus. During his important governorship, money began to circulate in the Barbaricum and the line of the
limes was stabilized.
Under the Flavians The
Year of the Four Emperors (69 AD) passed with peace in Pannonia. Flavianus declared for
Vespasian and led his legions to Italy against
Vitellius. Vespasian () invested greatly in the construction of the
limes. Discarding the Augustan strategy where the legions' role was with maintaining order in their provinces, the
Flavian emperors continually moved them to the border. This way they were prevented from interfering in
domestic policy, while the conquests were already pacified. Systematic circulation of money in the region situated north of the Drava shows that by this time Roman civilization had firmly taken root there.
Domitian's () emperorship saw expensive wars with the barbarians, as a result of which the military emphasis shifted to the Danube frontier. At the end of 85 or the beginning of 86, the reemerging Dacians under
Decebalus raided
Moesia, killing its governor and eradicating a legion. After a brief stay, Domitian left
Cornelius Fuscus to deal with the situation. After clearing the province of raiders, Fuscus undertook a disastrous campaign and lost his life (86). Finally, in 88,
Tettius Julianus defeated Decebalus and the sides agreed to make peace. Vangio and Sido were most likely dead by now, the Marcomanni and
Quadi denied vassal duties. When the emperor's punitive expedition (partially sent through Dacian territory) was repelled in 89, he—despite the damages suffered—settled for mild terms with Decebalus, instead committing his forces elsewhere. In the same year, he held his triumphs over the Dacians and
Chatti, but not over the disloyal Danubian Germans. When the Romans started supporting the
Lugii against them, they made a pact with the Iazyges. This produced another war, almost completely unknown except for another catastrophe and destruction of a legion at the hands of the nomads. In 92 or 93, he finished the war, but held only an
ovation, indicating he probably had further plans in Pannonia.
Under the Antonines We hear of war with the Danubian Germans again under
Nerva (). Between 103 and 107,
Trajan () executed the division of the province into
Pannonia Inferior and
Pannonia Superior. This allowed the Empire to better combat the radically different Germanic and Sarmatian tribes. While Superior had most urbanized areas and a shorter frontier with three legions, Inferior contained one
municipium and one legion, virtually being a border zone. Under his reign, the placement of garrison and the main lines of commerce became permanent. The creation of
Roman Dacia had a great effect on Pannonia. In
Trajan's Dacian Wars, the Iazyges allied with the Romans, seeking to retain
Oltenia where they were expelled by Decebalus. A brief confrontation in 107 was resolved
Hadrian, then-governor of Pannonia Inferior and it may have been agreed that the nomads would instead take possession of the region between the Tisza and the
Apuseni Mountains, not incorporated into the new province. However, taking advantage of Trajan's death and the preoccupation of the Empire with the
Parthian war, they joined forces with the relative
Roxolani and attacked again in 117, to which Dacia's governor,
Julius Quadratus Bassus fell victim. Hadrian () traveled to the spot and invested
Marcius Turbo as governor of both Dacia and Pannonia Inferior to defeat the barbarians. The Roxolani were pacified first. Turbo's authorization was over in 119 as Iazyx peace envoys appeared in Rome. The postal connection between the two provinces through the Danube–Tisza Interfluve—which aggravated relations with the Sarmatians—was completed. War with the Quadi broke out again in the last years of Hadrian's reign, which his adopted son and joint governor of the Pannonian provinces,
Aelius Caesar successfully handled until he died in 138. Command of Pannonia Superior was taken over by
Haterius Nepos, who ended the war with a Roman victory, becoming the last person to be awarded with
ornamenta triumphalia. Under
Antoninus Pius's () quiet reign, some coins were issued propagating not the ending of a new campaign but the reestablishment of
foederatus relationship by the investiture of a new Quadi king. Discharges and detachments of troops happened. Findings of hoards of coins likely buried during the rule of
Marcus Aurelius () evidence turmoil due to barbarian attacks. Large-scale population movements in
Northern and
Eastern Europe related to the
Goths highly endangered Rome's clients, who wanted the Empire to give its lands to settlement and extend its protection over the tribes. Rome was unwilling to grant these requests. The Romans may not have been aware of the dangerous situation at the start of the
Parthian war of Lucius Verus because they sent a whole legion and many
vexillationes away from Pannonia. It is thanks to the diplomatic efforts made by regional governors that tensions were eased until the dispatched forces could get back. When the threat became fully clear, Marcus even raised new legions. The first attack came in the winter of 166-167, from the
Lombards and
Ubii, between
Brigetio and
Arrabona. It was quickly repulsed by two auxiliary units.
Cassius Dio tells of a legation of 11 tribes led by the Marcomanni subsequently petitioning the governor of Pannonia Superior,
Iallius Bassus to concede. This may have been the last attempt at making peace, as next, a barbarian coalition formed to fight Rome. In 168, Marcus and
Verus returned to Aquileia and set up their base there. The Marcomanni and Quadi broke through the border and the Alps' crosses, besieging the city and burning the small town of
Opitergium. The peak of the
Antonine Plague in the peninsula was at this time, causing Verus's death. The next years' heavy fighting resulted in the death of governor of Moesia Superior and Dacia
Claudius Fronto and
praetorian prefect Macrinius Vindex.
Claudius Pompeianus and future-emperor
Pertinax returned part of the spoils taken by the enemy and led the offensive starting from 172. Against severe losses, the Romans forced first the Quadi, then the Marcomanni to surrender (172–173), while the military emphasis shifted to the Iazyges. Although the winter incursion of the Iazyges was crushed (173-174), the Quadi overthrew their Roman-installed king and started to support the nomads. While the two nations tried to negotiate, Marcus eventually defeated both of them in separate campaigns. The second phase of the war started in 177. The attacking barbarians were kept in check, with Marcus and his son, the newly acclaimed
Commodus () coming to Pannonia. A decisive campaign by
Tarrutenius Paternus in 179 convinced the Iazyges to make peace. In the same year, the land of the Danubian Germans was occupied by a force Cassius Dio claims to be 40,000 men—the number of soldiers stationed in Pannonia Inferior and Pannonia Superior combined. Control over tribes was taken over by prefects.
Valerius Maximianus, born in Pannonia, was an important general here. Any possible plans with the creation of two new provinces—Marcomannia and Sarmatia—were aborted after the death of Marcus in 180. Commodus returned to the old border and client system, to which new residents were seemingly willing to join. As the barbarians pillaged during the war, taking cattle and captives away en masse, the destruction and loss of life in Pannonia was huge. Commodus vigorously started to strengthen the
limes with new fortifications. Minor raids on the province continued to occur, prompting a third campaign over the Danube at about. This campaign was smaller, and its leader,
Tigidius Perennis, achieved a victory. Another victorious expedition was conducted in 188.
Under the Severans During the
Year of the Five Emperors (193), no attack was made on Pannonia. According to
Herodian,
Septimius Severus () calmed the barbarian tribes via negotiations before marching off his troops to Italy and gaining the throne. In the coming years, the arrival of foreign groups led to new conflicts, but these were centered on Dacia and Pannonia only experienced collateral effects. The Severans' rule was supported by the Pannonian military and other provinces of the collective "Illyricum" region, which became politically important. In 202, a thorough visit to Pannonia by the imperial house was organized. Partly during this tour and throughout Severus' reign, the province benefited from many constructions. The road network was fully repaired, civilian and military buildings were inaugurated, military camps were improved and cities were protected with walls thus increasing their rank.
Administration Pannonia Superior was under the consular legate, who had formerly administered the single province, and had three legions under his control. Pannonia Inferior was at first under a praetorian legate with a single legion as the garrison; after
Marcus Aurelius, it was under a consular legate, but still with only one legion. The frontier on the Danube was protected by the establishment of the two colonies
Aelia Mursia and
Aelia Aquincum by
Hadrian. Under
Diocletian and his successors, a fourfold division of the country was made: •
Pannonia Prima in the northwest, with its capital in Savaria, it included
Pannonia Superior and the major part of Central Pannonia between the Raba and Drava, •
Pannonia Valeria in the northeast, with its capital in
Sopianae, it comprised the remainder of Central Pannonia between the Raba, Drava and Danube, •
Pannonia Savia in the southwest, with its capital in
Siscia, •
Pannonia Secunda in the southeast, with its capital in
Sirmium Diocletian also moved parts of today's
Slovenia out of Pannonia and incorporated them in
Noricum. In 324 AD,
Constantine I enlarged the borders of Roman Pannonia to the east, annexing the plains of what is now eastern Hungary, northern Serbia and western Romania up to the
limes that he created: the
Devil's Dykes. In the 4th–5th century, one of the dioceses of the Roman Empire was known as the
Diocese of Pannonia. It had its capital in
Sirmium and included all four provinces that were formed from historical Pannonia, as well as the provinces of
Dalmatia,
Noricum Mediterraneum and Noricum Ripense. File:Pannonia01.png|Pannonia in the 1st century File:Pannonia02.png|Pannonia in the 2nd century File:Pannonia03 en.png|Pannonia in the 4th century File:Limes4-en.png|Pannonia with Constantine I "limes" in 330 AD
Loss In the 4th century, the Romans (especially under
Valentinian I) fortified the villas and relocated barbarians to the border regions. In 358 they won a great victory over the
Sarmatians, but raids didn't stop. In 401 the
Visigoths fled to the province from the
Huns, and the border guarding peoples fled to
Italia from them, but were beaten by
Uldin in exchange for the transferring of Eastern Pannonia. In 433 Rome completely handed over the territory to
Attila for the subjugation of the
Burgundians attacking
Gaul. == After Roman rule ==