Ward Loren Schrantz, of Carthage, Missouri, entered the U.S. Army in 1912, at a time when military leaders were still seriously debating the future of the horse cavalry. He left active military service in 1946, after the United States dropped the atomic bomb on Japan. Schrantz served capably at a time when the U.S. military was undergoing rapid technological and strategic transformation and, as a journalist and attentive observer, left a vivid personal account of his time in the Army and Missouri National Guard. Editor Jeff Patrick has woven three undated versions of Schrantz's memoir into a...