Heavy bomber version of the bouncing bomb, was used to destroy the Mohne and Eder dams by Lancasters from the specially recruited and trained 617 Squadron, often known as the Dambusters, under Wing Commander Guy Gibson. In March and April 1945, as the war in Europe was ending, Lancasters dropped Grand Slams and Tallboys on U-boat pens and railway viaducts across north Germany. At Bielefeld more than of railway viaduct was destroyed by Grand Slams creating an earthquake effect, which shook the foundations. The Boeing B-29 Superfortress was a development of the Fortress, but a larger design with four Wright R-3350 Duplex-Cyclone
The Boy Who Was on Salerno. Chapter 7, "The Crusader", is about the Children's Crusade from two viewpoints: that of a minstrel who has heard the tale and retells it at a great feast, and that of the young boy who led the crusade, whom Nino befriends. Chapter 8, "Students of Salerno", is about John of Procida and his diplomatic and spying work in favor of the Hohenstaufen rulers of southern Italy against Charles of Anjou's French. Chapter 9, "Redbeard and Saint Andrew", tells about a raid of the Muslim privateer Barbarossa on Amalfi, and how the town was saved by a miraculous storm.