The history of Ireland is complex, and has been plagued with religious, political, and military influences that have created divisions within its population. Ireland's experience throughout the French Revolutionary and Napoleonic Wars highlighted and intensified such divisions that have influenced Irish society into the twenty-first century. This body of work is an analysis of the British Army in Ireland during the period 1793 to 1815, which proved to be a critical era in British and Irish history. The consequences of the events and government policies of that time helped to determine the social and political divisions within Ireland for the following two centuries. The intention of this book is to provide an analytical synthesis of the military history of Ireland during this time, focusing on the influences, experiences, and reputations of the various elements that comprised the Irish military forces. This revisionist study provides a holistic approach by assessing the militia, yeomanry, fencible, and regular regiments in relation to their intended purpose within Britain's strategy. By focussing on deployment, organization, performance, leadership, and reputations, as well as political and military background, a number of perpetual misconceptions have been exposed, especially in relation to the negative historiography surrounding the Irish Militia and Yeomanry due to sectarian bias.