Although numbers varied, at any one time the Irish Jacobite army mustered about forty-five regiments of infantry and nineteen of cavalry and dragoons. In all, just over a hundred regiments can be identified, together with more than a dozen independent troops and companies. This work lists the units, and briefly recounts the lineage and history of each. About 4,500 officers served in the army in Ireland between 1685 and 1691. The officers of each unit, where known, are listed with summaries of the biographical details of over a thousand. General officers together with those who served as artillerists, engineers and in other roles are included. There are also lists of several hundred British and French officers who served in Ireland at the time. The work complements The Irish Jacobite army (2024), co-written by its author. Together, the two volumes provide the most comprehensive account of this force and its personnel ever published. Fully indexed, it is also be a valuable reference book for genealogists.
Harman Murtagh is a former president of the Military History Society of Ireland, and a former senior lecturer and visiting fellow at Athlone Institute of Technology, now the Technological University of the Shannon. His most recent book is The Irish Jacobite Army (Dublin, 2024).