Germany’s motives for invading the two countries were numerous. Firstly, German industry was dependant on the import of iron ore from Sweden. This ore was sent via the Norwegian port of Narvik. Control of the Norwegian coastline could allow the Allies to implement an efficient blockade of Germany. This blockade could create strategic difficulties for the German forces. The occupation of Norway allowed Germany to control the nearby seas and to organise future operations by German submarines against the United Kingdom.