During World War II all submariners ( including the rear echelon ) accounted for less than two percent of Navy personnel .
During World War II all submariners ( including the rear echelon ) accounted for 55 percent of Japan 's merchant marine losses .
During World War II all submariners ( including the rear echelon ) accounted for less than two percent of Navy personnel , but accounted for 55 percent of Japan 's merchant marine losses .