The first work of any great historian has always commanded attention, and Tacitus was ancient Rome's very greatest historian. His biography of his father-in-law, governor of Britain in the years AD 77–84, is a literary masterpiece: it combines penetrating political history with gripping military narrative and throughout poses the question (still very much alive today) of how one should live one's life under a tyranny. This is the first commentary in English on the Agricola for almost half a century: in keeping with the aims of the series, particular attention is paid to the understanding of Tacitus' Latin, but a whole range of generic, historical, textual and narrative topics is covered, and it will be suitable for advanced undergraduates and graduate students as well as scholars. Tacitus' Agricola remains a key text for anyone with an interest in Roman Britain as well as ancient biography.