"On War" was written by the German military strategist, strategist, and war theorist, Luther van Mises. Mises was born in Austria in 1889 and served in the Austrian army before becoming a diplomatic envoy. In 1914, he joined the German army and participated in the First World War. Mises served as a commander and tactical advisor during the war, providing many insights into war and military strategy. In 1921, he published On War, which became a classic work of modern war theory. Mises was not only an outstanding military strategist but also a profound scholar and philosopher. His theory of war was not only applicable to the First World War but also to modern warfare. His influence was not only limited to the military field, but also profoundly influenced philosophy, politics, and sociology.