By this time next week, Martin O’Neill’s Celtic could be fighting a three front war like Leonidas and the Spartans

The story of Leonidas and the Spartans is legendary because it tells the tale of how he led a small army of about 7,000 men – including 300 Spartans – against the might of the Persian army. Historians estimate that the Persian army numbered somewhere between 120,000 and 300,000 men...