The Volcae are a tribal confederation constituted before the raid of combined Gauls that invaded Macedon circa 270 BCE and defeated the assembled Greeks at the Battle of Thermopylae in 279 BCE.

Though our view of Celtic tribal configurations has to be pieced together from mentions in Greek and Latin sources, for archaeology determines no tribal identities purely through material culture of the late La Tène Celts, tribes called Volcae are to be found simultaneously in southern France, Moravia, the Ebro River valley, and Galatia in Asia Minor (Anatolia).Driven by highly mobile groups operating outside the tribal system and comprising diverse elements, the Volcae are one of the new ethnic entities formed during the Celtic military expansion at the beginning of the third century BCE.

Collecting in the famous excursion into the Balkans, ostensibly, from the Hellene point-of-view, to raid Delphi, a branch of the Volcae split from the main group on the way into the Balkans and joined two other tribes, the Tolistobogii and the Trocmi, to settle in central Asia Minor and establish a new Gaulish identity as the Galatians.The Tectosagii are a sept of the Volcae who move through Macedonia into Asia Minor circa 270 BCE.

Strabo says the Tectosagii came originally from the region near modern Toulouse, in France.