Although the Royal Canadian Navy had spent the early years of the Second World War in a desperate struggle against German U-boats on the North Atlantic convoy routes, the service's professional officers never lost sight of the need to build a balanced national navy, one that included the larger warships required for Canada to project its naval power around the globe. Part 2 of the Official Operational History continues the story of the Royal Canadian Navy begun in No Higher Purpose and carries the narrative into the decisive final years of the Second World War, as the navy largely achieves its "blue water" ambitions".