Battle of Knocknaclashy Boyle had inspired a mutiny among the English Royalist garrison in Cork, causing them to defect to the Parliamentarians. This had outflanked the defences of Irish Confederates and English Royalists, causing them to retreat behind the river Shannon into Connacht, where they held the fortified cities of Limerick and Galway. Henry Ireton went on to besiege Limerick. The only organised Irish forces remaining in south Munster were those of Donagh MacCarthy, Viscount Muskerry, who held out in the mountainous area of west Cork and county Kerry – which was his clan’s native territory. In July 1651, Muskerry set out from
County Cork mountain ranges include: the Slieve Miskish and Caha Mountains on the Beara Peninsula, the Ballyhoura Mountains on the border with Limerick, and the Shehy Mountains which contain Knockboy (706 m), the highest point in Cork. The Shehy Mountains are on the border with Kerry and may be accessed from the area known as Priests Leap, near the village of Coomhola. The Galtee Mountains are located across parts of Tipperary, Limerick, and Cork and are Ireland's highest inland mountain range. The upland areas of the Ballyhoura, Boggeragh, Derrynasaggart, and Mullaghareirk Mountain ranges add to the range of habitats found in the