Owing to a mistake in the way, however, they passed by one another, and Demetrius, throwing his forces into Epeirus, plundered the country, while Pyrrhus, encountering Pantauchus, joined battle with him.
Edition :
Plutarch Lives IX: Demetrius and Antony, Pyrrhus and Caius Marius, Ed. Jeffrey Henderson, trans. Bernadotte Perrin (The Loeb Classical Library 101), Harvard University Press: Cambridge/MA - London 1968 (first ed. 1920).
Remark :
perpetrator: The victory is mentioned in 7.5. date: This battle takes place "a little while" (10.1) before Pyrrhus' expedition into Macedonia, so 290/89 BC.