The Galatians were a Celtic people that dwelt mainly in the north central regions of Asia Minor or Anatolia, in what was known as Galatia, in today's Turkey. In their origin they were a part of the great Celtic migration which invaded Macedon, led by Brennus. The original Celts who settled in Galatia came through Thrace under the leadership of Leotarios and Leonnorios c. 278 BC. These Celts consisted mainly of three tribes, the Tectosages, the Trocmii, and the Tolistobogii, but they were also other minor tribes. They spoke a Celtic language, the Galatian language, which is sparsely attested.