Book excerpt: The Protestant war cry of 'No Surrender!' was first used in 1689 by the Mayor of Londonderry as James II's army laid siege to the city for 105 days, during which half the city's population died. There were many acts of courage, from the heroic death of Captain Browning to the anonymous, apprentice boys who played signal roles in the defence of the city. The book examines how the Jacobites might have achieved success, and the far reaching impact of the siege as a crucial event in the second British civil war. This is a military study of one of the most iconic episodes in Irish history, based on contemporary accounts, official records of the day, and published works on the siege. With an understanding of seventeenth-century warfare, especially siegecraft, the author probes many of the myths that have grown up around the siege and sets it in its proper context. Its ramifications for the consequent history of Ireland cannot be over emphasised.