In 279 BC a Gallic Army under a general named Brennus invaded Greece. They won a victory at Thermopylae and even sacked Delphi. However they were eventually defeated, Brennus was killed, and the Gauls left Greece. However, what if the Gauls were able to overrun Greece? How would that change the history of the region? The culture? Would the Gauls be assimilated or would a fusion of Gaelic and Greek cultures emerge? Could the Gaelic warlords even stay in power long?