Cerethrius was to be leader against the Thracians and the nation of the Triballi. The invaders of Paeonia were under the command of Brennus and Acichorius. Bolgius attacked the Macedonians and Illyrians, and engaged in a struggle with Ptolemy, king of the Macedonians at that time. It was this Ptolemy who, though he had taken refuge as a suppliant with Seleucus, the son of Antiochus, treacherously murdered him, and was surnamed Thunderbolt because of his recklessness. Ptolemy himself perished in the fighting, and the Macedonian losses were heavy. But once more the Celts lacked courage to advance against Greece
, and so the second expedition returned home.