The account in this volume begins with Admiral of the Fleet Sir Andrew Cunningham's assumption of the First Sea Lordship on 5 October 1943, and concludes with the formal surrender of Japan on 2 September 1945. This volume is entitled Anglo-American-Canadian Naval Relations, 1943-1945, for the very good reason that, by the end of the war, the Royal Canadian Navy was the third largest in the world, after its two great partners, and Canadian naval and air forces played a major role in anti-submarine warfare in the Atlantic, and rendered important service also in other theatres. The period covered by this volume was the time in which victory was forged and the three major Allies enjoyed an almost unbroken series of maritime triumphs. In Part I, the relationships of the senior commanders, their services and their countries are discussed. Part II deals with the last stage of the fight against the U-boats, a war which by 1943 had spread to most of the world's seas. Part III deals with the Western Allies' eventual return to North West Europe. In Part IV, the final operations in the Mediterranean, including the landings in Southern France and at Anzio in Italy, are covered. Part V recounts the participation of the British Pacific Fleet in the concluding operations against Japan.