This is the story of an undergunned merchant ship that fought a brave but futile battle to save an allied convoy. In November of 1940, the German pocket battleship Admiral Scheer attacked British Convoy HX-84. The Armed Merchant Cruiser HMS Jervis Bay, the only escort and mounting antique 6-inch guns, charged the Nazi raider. While the Jervis Bay did not stand a chance of surviving the battle, her crew's fatalistic bravery inspired awe in all who witnessed the fight. The Scheer's 11-inch guns turned the converted passenger liner into a burning hulk in twenty-two minutes, but most of the convoy escaped. How did this confrontation come to pass? Both the necessity of arming a passenger liner and pretending it was a warship, and the building of the Admiral Scheer and her sister ships for the express purpose of commerce raiding, find their roots in the events, political decisions, re-armament polices, war plans, naval traditions, and blunders that arose in pre-war Britain and Germany. But this event holds a significance beyond the battle itself. The sinking of the Jervis Bay symbolizes the end of an era in naval warfare. The Armed Merchant Cruisers of the Second World War inherited a long sometimes noble and sometimes ignoble history. Long employed in blockade or patrol duty, armed merchant cruisers ventured out for the first time to escort convoys, a defensive duty for which they were eminently unsuited, and for which the Jervis Bay paid a fearful price. It tells an exciting tale of heroism from World War II, and sets this tale in the context of the history of Armed Merchant Cruisers.