Galatia was a region in north-central Anatolia (modern-day Turkey) settled by the Celtic Gauls c. 278-277 BCE. The name comes from the Greek for "Gaul" which was repeated by Latin writers as Galli. The Celts were offered the region by the king of neighboring Bithynia, Nicomedes I (r. 278-255 BCE) and established themselves in three provinces made up of four cantons (wards) comprised of city-states (known as oppidum) governed, respectively, by the three tribes which made up the initial group: the Tectosages, Trocmil, and Tolistogogii.
This is a companion discussion topic for the original content at https://www.worldhistory.org/galatia/.