D. H. Parry was an author and historian, primarily known for his writings on military history, particularly focusing on wars and the army's experiences during the conflict. He was deeply interested in the personal stories of soldiers and the human costs of war, and his works often explore the bravery, sacrifice, and challenges faced by those who served. Parry's most notable work, With Haig on the Somme, provides a vivid account of the Battle of the Somme, one of the most devastating battles. His writing is characterized by its attention to detail and its empathy for the soldiers who fought on the frontlines. Parry wrote about earlier military engagements, such as the Crimean War and the exploits of the army in various conflicts. His books, including The Death or Glory Boys: The Story of the 17th Lancers and The V.C.: Its Heroes and Their Valor, focus on the valor and heroism displayed by soldiers in these campaigns. Through his writing, Parry helped to preserve the history and memory of military service, offering readers a deeper understanding of the personal sacrifices made by soldiers in war.