 The scope of "Festung Norwegen" originally included the entire coastal perimeter of Norway, from the Oslofjord around the southern coast and to the border with the Soviet Union.Part of the invasion plan for Norway included the immediate deployment of German coastal artillerymen in Norwegian batteries, around the main cities of Horten, Kristiansand, Stavanger, Bergen, Trondheim, and Narvik.An extensive network of coastal artillery batteries with heavy (>15.5 cm), medium (12-15.5 cm) and light (<12 cm) ordnance was set up around the entire coast.