SHOW / EPISODE

Episode 83. Year of Four Emperors, Part One: Galba and Otho

Episode 83
40m | Sep 3, 2026

Works Cited

Primary Sources

  • Cassius Dio. Roman History, Books 63 and 64. Greek narrative covering the full Year of Four Emperors, surviving partly in epitome form. Useful as a comparison to the Tacitean account.
  • Plutarch. Life of Galba and Life of Otho. Greek-language biographical material composed in the early second century, with the Otho biography preserving substantial material on the First Battle of Bedriacum and on Otho's death. Plutarch's account often parallels Tacitus's but preserves some independent material.
  • Suetonius. Life of Galba and Life of Otho. Biographical material on both emperors with substantial detail on the political and personal events of the period. Suetonius preserves material that Tacitus does not, including detailed personal anecdotes whose historical reliability varies.
  • Tacitus. Histories, Book 1 and the early portion of Book 2. The Galba reign, the Otho conspiracy, the Otho principate, and the First Battle of Bedriacum are preserved in detailed narrative form. The death of Otho is preserved at Histories 2.47 through 2.50. The Histories were composed in the early second century and are, in the surviving form, the principal narrative source for the Year of Four Emperors.


Secondary Sources

  • Greenhalgh, P. A. L. The Year of the Four Emperors. Weidenfeld and Nicolson, 1975. Older scholarly treatment, still valuable for the military-strategic analysis.
  • Morgan, Gwyn. 69 A.D.: The Year of Four Emperors. Oxford University Press, 2006. More recent scholarly treatment with substantial material on the political-cultural dynamics of the period.
  • Murison, Charles L. Galba, Otho and Vitellius: Careers and Controversies. Olms, 1993. The standard scholarly biographical treatment of the three figures, with substantial attention to the source-critical problems each one presents.
  • Wellesley, Kenneth. The Year of the Four Emperors. Third edition, Routledge, 2000. The standard scholarly treatment of the entire period. The framework of this episode and the next owes substantial debts to Wellesley's analysis.


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