On 5 November, a naval force led by Admiral Sir William Winter arrived at Smerwick Harbour, replenishing the supplies of Grey de Wilton, who was camped at Dingle, and landing eight artillery pieces. On 7 November, Grey de Wilton laid siege to the Smerwick garrison. The invading forces were geographically isolated on the tip of the narrow (Dingle Peninsula), cut off by (Mount Brandon), one of the highest mountains in Ireland, on one side, and the much larger English force on the other. The English forces began the artillery barrage on on the morning of the 8 November, which rapidly broke down the improvised defences of the fort.