Up to half a million Irishmen and women participated in the Great War. Until very recently only the sacrifices made by roughly a third of their number, the men of Ulster, have been remembered and commemorated with any pride or regret, while the participation of over 300,000 men and women from the Irish nationalist tradition has been virtually written out of the history of modern Ireland. This book addresses that omission. Drawing on the diaries, letters, literary works and oral accounts of soldiers, it tells some of the personal stories of what Irishmen, unionist and nationalist, went through during the Great War and how, ironically, many of them drew closer together during that horror, than at any time since. This volume deals with a selection of the most important battles and campaigns in which the three Irish Divisions (and other Irish regiments of the old Regular Army) participated.