The north Wales seaside resort of Llandudno developed in the 1850s from a scatter of small settlements on the slopes of the Great Orme. The Iron Age defences of Pen Dinas hill fort and the presence of Roman coin hoards suggest local military conflict, and skirmishes are recorded from the time of the Vikings. In later centuries the focus for military activity stretches a mile or so down the Conwy Valley to the castles of Deganwy and battles between...