The battle took place near the source of the Caecus River (Ancient Greek: Κάϊκος, romanized: Káïkos) and resulted in a victory for the Kingdom of Pergamon.

The exact date of the battle is unknown, but it seems to have taken place early in the reign of Attalus I. Attalus I celebrated it as a great victory and as establishing his legitimacy as ruler early in his reign, and used it as a reason to dub himself Soter, Savior, and to take the title of basileus, king.

After passing through Greece, they arrived in Asia Minor, where they survived by raiding the towns along the Mediterranean coast.

[4] The stoppage of payment led to a military mobilization by both the Pergamenes and the Galatians, eventually leading to war between the two parties.

He recorded what was purportedly a prophecy of the sibyl Phaennis, written a generation before the battle, that predicted the battle and states as follows:[6][5] Then verily, having crossed the narrow strait of the Hellespont, The devastating host of the Gauls shall pipe; and lawlessly They shall ravage Asia; and much worse shall God do To those who dwell by the shores of the sea For a short while.