The Arctic convoys run to the ports of Northern Russia from 1941 to 1945 combined the man-made and maritime horrors of the Battle of the Atlantic with the unforgiving ferocity of one of the most inhospitable of the world's climates. Maintaining that lifeline through the waters of the Arctic circle was essential to the development and maintenance of the Anglo-American alliance with the Soviet Union. With the massive campaign on Germany's Eastern front hanging in the balance in 1941 to 1942, the German Armed Forces deployed significant numbers of submarines, bomber and torpedo aircraft, together with heavy ships such as the Tirpitz and Scharnhorst, against the slow-moving Allied convoys of merchant ships and their escorting forces. The challenge to maintain this lifeline placed a heavy burden on the resources of the Royal Navy. Here, in a contemporary battle summary, prepared by the Naval Staff of the Royal Navy, and supported by academic analysis and an extensive photographic section, those challenges and difficulties, the tragedies and the triumphs of the Arctic convoys, are laid bare.