sent by cargo ship to Germany through the Baltic Sea via the Swedish port of Lule� on the Gulf of Bothnia. However, when the Gulf of Bothnia froze during the winter, more shipments of the ore needed to be transported through Narvik and, from there, down the west coast of Norway to Germany. The town of Narvik is linked by rail to Sweden, but not to any other towns in Norway. As a result, Narvik serves as a gateway to the ore fields of Sweden that cannot be easily reached from southern Norway via land. Winston Churchill realized that the control of Narvik meant stopping most German imports of iron ore during the winter of 1940. This would be advantageous to the Allies, and it might help shorten the war. Equally as important, later in the war, German submarines and warships based there threatened the allied supply line to the Soviet Union.
Churchill proposed laying a naval minefield in Norwegian territorial waters around Narvik (referred to as "the Leads"), or else occupying the town with Allied troops. The Allies hoped that they might be able to use an occupied Narvik as a base from which to secure the Swedish ore fields and/or to send supplies and reinforcements to Finland, then fighting the Finnish Winter War with the Soviet Union. Plans to lay a minefield around Narvik or to seize the town met with debate within the British government - since both plans would mean a violation of Norway's neutrality and sovereignty.
Finally, on 8 April 1940, the British Admiralty launched Operation Wilfred, an attempt to lay anti-shipping minefields around Narvik in Norwegian territorial waters. Coincidentally, Germany launched its invasion of Norway (Operation Weser�bung) on the next day. During this invasion, ten German destroyers, each carrying 200 mountain infantry soldiers, were sent to Narvik. The outdated Norwegian coastal defence ships HNoMS Eidsvold and HNoMS Norge attempted to resist the invasion, but both Norwegian warships were sunk after a short and
