Amazon.com description: Product Description: Shades of Blue and Gray places the 1861-1865 conflict within the broad context of evolving warfare. Emphasizing technology and its significant impact, Hattaway includes valuable material on land and sea mines, minesweepers, hand grenades, automatic weapons, the Confederate submarine, and balloons. The evolution of professionalism in the American military serves as an important connective theme throughout. Hattaway extrapolates from recent works by revisionists William Skelton and Roy Roberts to illustrate convincingly that the development of military professionalism is not entirely a post-Civil War phenomenon. Informative and clearly written, enhanced by graceful prose and colorful anecdotes, Shades of Blue and Gray will appeal to all listeners.