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Trajan succeeded his adoptive father Nerva as Roman emperor; the Roman Empire reached its maximum extent under his rule.
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AD 98
Calendar year
AD 98 (XCVIII) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Traianus. The denomination AD 98 for this year has been used since the early medieval period, when the Anno Domini calendar era…Source: Wikipedia (CC BY-SA)
Trajan
Roman emperor from AD 98 to 117
Trajan was a Roman emperor from AD 98 to 117, remembered as the second of the Five Good Emperors of the Nerva–Antonine dynasty. He was a philanthropic ruler and a successful soldier-emperor who presided over one of the greatest military expansions in Roman history, during which,…Source: Wikipedia (CC BY-SA)
Nerva
Roman emperor from AD 96 to 98
Nerva was a Roman emperor from 96 to 98. Nerva became emperor when aged almost 66, after a lifetime of imperial service under Nero and the succeeding rulers of the Flavian dynasty. Under Nero, he was a member of the imperial entourage and played a vital part in exposing the…Source: Wikipedia (CC BY-SA)
Roman emperor
Ruler of the Roman Empire
The Roman emperor was the ruler and monarchical head of state of the Roman Empire, starting with the granting of the title augustus to Octavian in 27 BC. The term emperor is a modern convention, and did not exist as such during the Empire. When a given Roman is described as…Source: Wikipedia (CC BY-SA)
Roman Empire
Roman imperial state and civilization from 27 BC to 476/1453 AD
The Roman Empire ruled the Mediterranean and much of Europe, Western Asia and North Africa. The Romans conquered most of this during the Republic, and it was ruled by emperors following Octavian's assumption of effective sole rule in 27 BC. The western empire collapsed in 476…Source: Wikipedia (CC BY-SA)