For more than two decades William S. Sims was at the forefront of naval affairs. From the revolution in naval gunnery to his development of torpedo boat and destroyer operations, he was a central figure in preparing the U.S. Navy for World War I. During the war, he served as the senior naval commander in Europe and was instrumental in the establishment of the convoy system. Following the war his leadership as president of the Naval War College established the foundation of the creative and innovative Navy that developed the operating concepts for submarines and aircraft carriers leading up to World War II. Despite his dramatic impact on the U.S. Navy, Sims’ books and articles are often overlooked. His lessons are especially important for today’s military, facing budget cuts as well as missions in transition. This book is a collection of Adm. William Sims’ written work, and it investigates his relevance in addressing the questions facing today’s military personnel and policymakers.