The Northern part of the Netherlands, comprising Friesland, Groningen and Drenthe was of strategic importance to the Germans because, as shown on the map above, the Allied approach routes to different German cities such as Emden, Bremen and Hannover crossed this part of the Netherlands. Aerial combat in the sky above Friesland, Groningen and Drenthe was almost a daily occurence, resulting in many crahsed allied bombers.