"barracks emperor : (Ancient Rome, historical) An emperor who seized power by virtue of his command..."

“barracks emperor : (Ancient Rome, historical) An emperor who seized power by virtue of his command of the army.
The Western Roman Empire is conventionally regarded as having fallen on this day in 476 C.E., when Odoacer deposed the 16-year-old Emperor Romulus Augustulus.”

- https://en.wiktionary.org/wiki/barracks_emperor#English

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