This is the second book in a series of two, covering the events at sea during the German invasion of Norway in 1940, the first modern campaign in which sea, air and ground forces interacted decisively. Part one covers the events at sea off southern and western Norway where Norwegian and British forces attempted to halt the German advance out of the invasion ports as well as the stream of supplies and reinforcements across the Skagerrak. The second part focuses on the British landings in Central Norway where the Royal Navy for the fist time had its mastery challenged by air superiority from land-based aircraft. Part three covers the events in and around Narvik where Norwegian, British, French and Polish naval, air and land forces were engaged in the first combined amphibious landings of WW II. Part four sums up the events during the evacuation in June, in which the first carrier task force operations of the war, including the loss of the carrier Glorious, figure prominently. As in the first volume, the narration shifts continuously between the strategic and operational issues, and the experiences of the officers and ratings living through the events. Extensive research and use of primary sources reveals the many sides of this war, some of which remain controversial to this day.