"The Military History of the 123d Regiment Ohio Volunteer Infantry" by C. M. Keyes is a historical account written in the late 19th century. This book chronicles the experiences of the 123rd Regiment, emphasizing their organization, battles, and day-to-day life during the American Civil War. The narrative aims to preserve the legacy of the soldiers involved, particularly focusing on their valor and experiences in combat. At the start of the narrative, the author discusses the thoughtful undertaking of chronicling the regiment's history and expresses a dedication to the soldiers who fought. The preface elaborates on the bond shared among those who served, hinting at a blend of personal anecdotes and factual military history. Keyes outlines the regiment's formation in 1862, detailing the recruitment process, initialization into service, and the individuals involved, including officers and ranks. The initial chapters set a tone of respect and camaraderie, indicating that the subsequent chapters will reveal both harrowing and heroic encounters of the regiment as they navigate the challenges of war. (This is an automatically generated summary.)