 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.These were typically placed so as to cover the approaches to main population centres and likely landing sites.