An illustrated study of RAF Coastal Command's deployment of the Beaufighter against German supply lines in 1941 and the long-running 'arms race' with Kriegsmarine Flak ships that followed.Crucial German shipping lines faced a new threat in 1941 when RAF Coastal Command debuted the iconic long-range Beaufighter. The aircraft and its subsequent Mk VIC and Mk X versions gave the Allies a tough, relatively fast and very hard-hitting platform for air attack on German convoys, and so it became essential for the Kriegsmarine to fit ever-heavier anti-aircraft batteries to its escort vessels, and even to develop specialist Flak vessels. In this compelling study, naval aviation historian Matthew Willis chronicles the little-explored arms race that saw RAF Coastal Command and the Kriegsmarine engaged in a fierce battle of one-upmanship until war's end. New artwork, rare archive photography and contemporary records of Beaufighter operations add depth to fascinating historical accounts, including the actions of the famous North Coates Strike Wing against shipping in the North Sea and the exploits of Beaufighter units tasked with severing Rommel's all-important supply lines.