The United States Navy operated long range fleet submarines in the Pacific during World War II in what has often been referred to as a 'forgotten' campaign. In fact the operations of these submarines in the Pacific contributed greatly to the war against Japan, depriving her of much needed supplies as well as curtailing troop movements and reinforcements during the 'island war.'This book details the histories of all US submarine losses during the Second World War together with a report of all operational cruises carried out by each vessel. Each submarine is described from the first to the last war patrol, and actions and sinkings are included. There is also a list of all Medal of Honour recipients, and a crew list of men lost.This is an important book to anyone studying naval warfare in the Pacific during World War II, and serves as the basis for further study of the submarine campaign carried out by the US Navy in particular. Illustrated with a number of photographs of personnel and vessels, it will serve as a first class introduction to the subject.