"Hand Grenades: A handbook on rifle and hand grenades" by Graham Montgomery Ainslie is a military technical manual published in 1917 during the early 20th century, amidst World War I. This handbook serves as a practical guide aimed at soldiers and military personnel, detailing the use and mechanics of hand grenades and rifle grenades, which became critical in trench warfare. The book is structured to provide rapid and comprehensive knowledge about the topic, making it accessible even to beginners in the field. The content of the book delves into a range of specific grenades used during the war, including their types, safety devices, explosives, and methods of use. Ainslie includes detailed descriptions of various grenades such as time grenades and percussion grenades, along with instructions on preparing, firing, and handling these weapons. He discusses the organization of grenade squads and the tactics involved in trench clearing, frontal attacks, and general grenade deployment in combat. By combining illustrations and clear instructions, Ainslie provides a manual that is essential for effectively using grenades in military operations, reflecting the pressing need for enhanced infantry tactics during the war. (This is an automatically generated summary.)