Legio I Adiutrix was a legion of the Roman army formed from veteran sailors after the death of Roman emperor Nero (r. 54-68 CE). During its long career, the legion accompanied Trajan (r. 98-117 CE) on his Dacian and Parthian campaigns, fought with Marcus Aurelius (r. 161-180 CE) in his German Wars, supported Septimius Severus in 193 CE, and was still active in the 5th century CE.
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Definition
Timeline
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68 CE - 69 CEYear of the Four Emperors: Civil war in Rome.
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69 CE - 70 CEBatavian Revolt.
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101 CE - 106 CETrajan conquers Dacia.
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114 CERoman emperor Trajan annexes Armenia and declares war on Parthia.
