This was the course of their expedition into +Thessaly [22.25,39.5] (region), Greece, Europe Thessaly, while the king was planning to cross into Europe (continent)Europe from Asia (continent)Asia and was already at Abydus [26.416,40.2] (deserted settlement), Canakkale, Marmara, Turkey, Asia Abydos. The Thessalians, now bereft of their allies, sided with the Persian wholeheartedly and unequivocally. As a result of this they, in their acts, proved themselves to be most useful to the king.