Pisidia was an inland region of ancient Asia Minor, located north of Lykia, and bordering Karia, Lydia, Phrygia and Pamphylia. Pisidia was a wild, mountainous region, and one of the most difficult for outside powers to control. It was largely independent from both the Lydians and the Persians. Alexander the Great had somewhat better luck, although the city of Termessos defied him, but the Hellenistic kings were never in full control. Cities in the region was among the last in western Anatolia to hellenize and to coin their own money. Among Pisidia's settlements were Termessos, Selge, Sagalassos and Etenna. The Pisidian language is poorly known, but is assumed to be a member of the Anatolian branch of Indo-European. Also see this Wikipedia article.