Although never previously studied in any depth, the sinking of the Lisbon Maru was the most costly American on British ‘Friendly Fire’ incident of the Second World War. Of the 4,500 of Hong Kong’s garrison who perished during the war, 1,000 died directly or indirectly from this sinking. From American, British, Hong Kong and Japanese sources, this book reconstructs the fateful voyage of the Lisbon Maru, and the experiences of the captives, the captors, and those on board the submarine that sank her. The book will be of interest to anyone wishing to know more about the ‘Hellships’ that caused the deaths of almost 20,000 Allied Prisoners of War during the Second World War, or the experiences of Allied POWs in Japan.