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I don't have any context provided to write an overview of "391 BC." You've indicated the context is "year," but without specific information about what happened in 391 BC or why it matters historically, I cannot write an accurate overview based solely on what you've given me. Could you provide additional context about 391 BC that I should base the overview on?
AI-generated from the Wikipedia summary — may contain errors.
Article
Year 391 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Flavus, Medullinus, Camerinus, Fusus, Mamercinus and Mamercinus (or, less frequently, year 363 Ab urbe condita). The denomination 391 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
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