The Decline and Fall of the Roman Empire · ¶285

Thirty thousand soldiers, under the command of Alexander, the son of Philip, who was intrusted by the Greeks with their glory and revenge, were sufficient to subdue Persia. The princes of the house of Seleucus usurped and lost the Macedonian command over the East. About the same time, that, by an ignominious treaty, they resigned to the Romans the country on this side Mount Tarus, they were driven by the Parthians, an obscure horde of Scythian origin, from all the provinces of Upper Asia. The formidable power of the Parthians, which spread from India to the frontiers of Syria, was in its turn subverted by Ardshir, or Artaxerxes; the founder of a new dynasty, which, under the name of Sassanides, governed Persia till the invasion of the Arabs. This great revolution, whose fatal influence was soon experienced by the Romans, happened in the fourth year of Alexander Severus, two hundred and…

Edward Gibbon · Project Gutenberg #731 (Milman edition) — public domain
Source edition
Passage preview. Read in context for the complete text, notes and references.