 In return, Callias promised (apparently never realized) assistance in men and money from Achaea, Megara, and Euboea.Callias' actions seemed to have taken place in 343 BC, at the time of Philip's planned attempt to take Ambracia.Aeschines ascribes his rival's support of Callias to be the result of corruption, but Demosthenes may have thought that Euboea, united under a strong government, might serve as an effective barrier to Philip's ambition.