Many have heard of the SAS (Special Air Service), but what about the SBS? Britain's SBS (Special Boat Service) was the first operations unit of its kind. Formed in 1940, this unit helped change the course of World War II. In this episode of Warfare, James is joined by Military Historian and Author Saul David. Sharing his research with the full cooperation of the SBS, Saul sheds light on the heroic tales of the frontline SBS soldiers.