Honorius was Roman emperor from 393 to 423. He was the younger son of emperor Theodosius I and his first wife Aelia Flaccilla. After the death of Theodosius in 395, Honorius, under the regency of Stilicho, ruled the western half of the empire while his brother Arcadius ruled the eastern half. His reign over the Western Roman Empire was notably precarious and chaotic. In 410, Rome was sacked for the first time since the Battle of the Allia almost 800 years prior.
Galla Placidia, daughter of the Roman emperor Theodosius I, was a mother, tutor, and advisor to emperor Valentinian III. She was queen consort to Ataulf, king of the Visigoths from 414 until his death in 415, briefly empress consort to Constantius III in 421, and managed the government administration as a regent during the early reign of Valentinian III until her death.
The 400s decade ran from January 1, 400, to December 31, 409.
Year 402 (CDII) was a common year starting on Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Arcadius and Honorius. The denomination 402 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 412 (CDXII) was a leap year starting on Monday of the Julian calendar. At the time, it was known in Europe as the Year of the Consulship of Honorius and Theodosius. The denomination 412 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 415 (CDXV) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Honorius and Theodosius. The denomination 415 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The 390s decade ran from January 1, 390 to December 31, 399
The 410s decade ran from January 1, 410, to December 31, 419.
Year 411 (CDXI) was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodosius without colleague. The denomination 411 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 455 (CDLV) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Valentinianus and Anthemius. The denomination 455 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The 370s decade ran from January 1, 370, to December 31, 379.
Year 375 (CCCLXXV) was a common year starting on Thursday of the Julian calendar. At the time, it was known in Rome as the Year after the Consulship of Augustus and Equitius. The denomination 375 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Constantius III was briefly Western Roman emperor in 421, having earned the throne through his capability as a general under Honorius. By 411 he had achieved the rank of magister militum, and in the same year he suppressed the revolt of the usurper Constantine III. Constantius went on to lead campaigns against various barbarian groups in Hispania and Gaul, recovering much of both for the Western Roman Empire. He married Honorius's sister Galla Placidia in 417, a sign of his ascendant status, and was proclaimed co-emperor by Honorius on 8 February 421. Constantius reigned for seven months before dying on 2 September 421.
Constantine III was a common Roman soldier who was declared emperor in Roman Britain in 407 and established himself in Gaul. He was recognised as co-emperor of the Roman Empire from 409 until 411.
Athaulf was king of the Visigoths from 411 to 415. During his reign, he transformed the Visigothic state from a tribal kingdom to a major political power of late antiquity.
Jovinus was a Gallo-Roman senator and claimed to be Roman Emperor.
Sebastianus, a brother of Jovinus, was an aristocrat of southern Gaul. After Jovinus usurped the throne of the western Roman Emperor Honorius in Gaul in 411, he named Sebastianus as Augustus (co-emperor) in 412. Coins bearing Sebastianus' image were then minted at Arles and Trier.
Heraclianus was a provincial governor and a usurper of the Western Roman Empire (412–413) opposed to Emperor Honorius, who had originally brought him to power. Heraclianus helped put down a rebellion by Priscus Attalus. However, he decided to stage his own rebellion and during his invasion of the Italian peninsula, was either defeated in battle or captured and executed.
The War of Heraclianus was a short military conflict in 412–413, between the imperial generals Heraclianus and Constantius III, in a period known for being very turbulent and violent. There were a large number of uprisings in the Western Roman Empire and various groups of barbarian tribes crossed the empire. The conflict between Heraclianus and Constantius can be seen as one of many links in the chain of events that set in motion the downfall of the Roman Empire. In the conflict, Constantius remained loyal to the emperor and Heraclian tried to become emperor of the empire himself.
