The Glen of Imaal ( or ; ) is a remote glen in the western Wicklow Mountains in Ireland. It is ringed by the Lugnaquilla massif and its foothills, including Table Mountain and Keadeen. Much of the glen is used by the Irish Army as an artillery firing range, and hill walkers who use the glen are advised to observe the times of firing practice and to refrain from picking up strange objects. The Glen of Imaal is the subject of an eponymously titled Irish folk song, and also the place of origin of the eponymous dog breed, the Glen of Imaal Terrier. History Early history The Glen of Imaal is named from the Uí Máil, who dominated the kingship of Leinster in the 7th century. They were ousted by the Uí Dúnlainge from the lowlands of what would be County Kildare, and from that time until the early 13th century were located along the western foothills of the Wicklow mountains. The valley appears to have been a center of their power. By the 14th century, O'Tuathail (O'Toole) (of the Uí Dunlainge) had taken the lordship of the Uí Máil, having in their turn been expelled from south Kildare by Norman incomers. Derrynamuck in the Glen Of Imaal is a cottage dedicated to the memory of Michael Dwyer, a celebrated 1798 leader. It is now known as the Dwyer-McAllister cottage, for it was there that a group of Irish rebels led by Michael Dwyer were hiding when they were surrounded by British forces. Samuel McAllister died when he drew enemy fire to allow Dwyer to escape. Military use Since 1900, much of the Glen of Imaal (5,948 acres) has been used as an army artillery range. Because of this, caution is advised when attempting to use areas within the army range, and notices are posted as to when the army are on field exercises. 1941 disaster On 16 September 1941, the Glen of Imaal was the site of the worst single incident involving loss of life in the history of the Irish Defence Forces. This incident, known as the Glen of Imaal Disaster, occurred during a training exercise involving 27 officers and men from the army's anti-aircraft battalion, artillery school, and corps of engineers. Sixteen soldiers were killed when an antitank mine unexpectedly exploded (15 dying immediately and 1 later succumbing to his wounds). Other injured soldiers were rushed to