The Union Navy played a vital role in winning the Civil War by blockading Confederate ports, cooperating with the Union Army in amphibious assaults, and controlling the Mississippi River and its tributaries. President Lincoln understood, however, that the Navy was not as important, militarily and politically, to the war effort as the Army, so he delegated authority to his Secretary of the Navy, Gideon Welles, who divided the Navy into six squadrons and hand-picked their commanders. This book...