Statistics for occurrence #1 of “Euphrates” in book 8, chapter 25 of Polybius, Histories:

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In the reign of Xerxes, prince of the city of Armosata, situated on the "Fair Plain," between the Tigris and Euphrates , King Antiochus encamped under its walls and prepared to attack it. When he saw the king's forces, Xerxes at first conveyed himself away; but feeling afterwards that, if his palace were seized by his...
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Entity Corpus Doc Corpus Doc  
Euphrates 192 6 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.