Book excerpt: [Includes 23 maps and 31 illustrations] This volume describes two campaigns that the Germans conducted in their Northern Theater of Operations. The first they launched, on 9 April 1940, against Denmark and Norway. The second they conducted out of Finland in partnership with the Finns against the Soviet Union. The latter campaign began on 22 June 1941 and ended in the winter of 1944-45 after the Finnish Government had sued for peace. The scene of these campaigns by the end of 1941 stretched from the North Sea to the Arctic Ocean and from Bergen on the west coast of Norway, to Petrozavodsk, the former capital of the Karelo-Finnish Soviet Socialist Republic. It faced east into the Soviet Union on a 700-mile-long front, and west on a 1,300-mile sea frontier. Hitler regarded this theater as the keystone of his empire, and, after 1941, maintained in it two armies totaling over a half million men. In spite of its vast area and the effort and worry which Hitler lavished on it, the Northern Theater throughout most of the war constituted something of a military backwater. The major operations which took place in the theater were overshadowed by events on other fronts, and public attention focused on the theaters in which the strategically decisive operations were expected to take place. Remoteness, German security measures, and the Russians’ well-known penchant for secrecy combined to keep information concerning the Northern Theater down to a mere trickle, much of that inaccurate. Since the war, through official and private publications, a great deal more has become known. The present volume is based in the main on the greatest remaining source of unexploited information, the captured German military and naval records. In addition a number of the participants on the German side have very generously contributed from their personal knowledge and experience.