In antiquity, many of the lands north of Italy were inhabited by a number of tribes collectively known as the Celts. To the Romans, these barbarians were a serious menace, threatening the security of Rome along its northern borders. The feud between the two peoples began as early as the fourth century BC and continued well into the Imperial era.

Theme: Celtic peoples go to war

• Michael Taylor, 'Historical introduction - Attack of the Celts!'.
• Gareth Williams, 'Roman writers on the Boudican Revolt of AD 60 - Slaughter or strategy'.
• Lindsay Powell, 'The Siege of Maiden Castle, AD 44 - How Iron-Age Britons faced a Roman asault'.
• Arnold Blumberg, 'Hannibal's Celtic warriors in the Second Punic War - In the service of Carthage'.
• Patrick Meyer, 'Celtic nobleman of 400 BC, near Trier - Vae victis!'.
• Chuck Lyons, 'The Roman siege of Alesia - The last stand of Vercingetorix'.
• Erich B. Anderson, 'Cursed gold, divine intervention or infantry superiority? - Celtic defeat at Delphi'.
• Stefano Marchiaro, 'The Iron-Age stone sculptures of Lunigiana - Ligurian stone warriors'.

• Joseph Hall, 'Brutality and the Roman soldier - Killing beyond the battlefield'.
• Duncan B. Campbell, 'Did Emperor Caligula plan to invade Britain? - Caligula's capers on the North Sea coast'.