Praetorian Guard Timeline

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27 BCE
Augustus creates the Praetorian Guard.
2 BCE
Augustus appoints two Prefects (praefectus praetorio) to command the Praetorian Guard.
5 CE
The term of service for the Praetorian Guard is extended from 12 to 16 years.
14 CE
Sejanus becomes the praefect of the Praetorian Guard.
c. 23 CE
The castra praetoria, permanent camp of the Praetorian Guard, is built in Rome by Sejanus.
31 CE
Sejanus, commander of the Praetorian Guard is tried and executed by the Roman Senate.
41 CE
The Praetorian Guard assassinates Roman Emperor Caligula.
193 CE
The Praetorian Gaurd assassinates Roman Emperor Pertinax.
217 CE
Macrinus, prefect of the Praetorian Guard, assassinates Caracalla and installs himself as emperor.
312 CE
Constantine I disbands the Praetorian Guard.