"Lucius Aelius Seianus (3 June 20 BC – 18 October AD 31), commonly known as Sejanus (/sɪˈdʒeɪnəs/), was a Roman soldier, friend and confidant of the ...
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Roman Emperor Tiberius. An equestrian by birth, Sejanus rose to power as prefect of the Roman imperial bodyguard, known as the Praetorian Guard, of which he was commander from AD 14 until his death in AD 31.
While the Praetorian Guard was formally established under Emperor Augustus, Sejanus introduced a number of reforms which saw the unit evolve beyond a mere bodyguard, into a powerful and influential branch of the government involved in public security, civil administration and ultimately political intercession; these changes would have a lasting impact on the course of the Principate." - (en.wikipedia.org 11.08.2021)
