The origin of the Royal Marines dates back to the formation of the Admiral's Regiment in the 17th century. Since then Marines have participated in more battles on land and sea than any other branch of the British Armed Forces. Their 'elite' status rests in the commandos the one formation that is trained to be delivered to battle by helicopter or landing craft from ships. This book examines the units, organization and operations of the Royal Marines, focusing on their activity in World War II's various theatres and their post-war operations in Northern Ireland, the Falklands and the Gulf.