A research analyst for the Center for Naval Analyses offers a rare historical account of the Royal and U.S. Navies' involvement in one of the greatest amphibious assaults of modern history. It is a story of cooperation and, at times, discord, between the two navies as they planned the naval portion of the Allied invasion of Normandy. With the evolution of amphibious warfare as a backdrop, the book has sufficient technical detail to satisfy the modern day practitioner of amphibious warfare, yet is written in a style that makes it accessible to the general public. Thoroughly researched at the U.