This book examines the Battle of Hampton Roads, 8 and 9 March 1862, the first battle of ironclads, to determine if it was a Revolution in Military Affairs. This book is an analysis of naval developments prior to March 1862, the battle, and the impact the battle had on the U.S. Navy and the Royal Navy from 1862 to 1871. The battle signaled the end of the wooden warship era when the CSS Virginia destroyed two wooden warships on 8 March 1862. The USS Monitor influenced a change in naval design, which led the U.S. Navy and the Royal Navy to build turreted warships, which culminated in the launching of the first modern battleship in 1871. The transformation from sailing and steam ships with broadside armament to steam-powered turret ships led to a reduction in the size of the crews and the acceptance of engineers into the naval community. The battle led both navies to assign ironclads to their squadrons to counter ironclads of hostile nations. The battle influenced the development of tactics for fighting ironclads including ramming and coastal warfare. The Battle of Hampton Roads was a Revolution in Military Affairs and the onset of modern naval warfare.