From the Utterslev Moor and up north, a line of forts and batteries were established.
Triangular fort
Most of the forts were triangular. At trangular shape was easier to defend from the caponiere in the moat. Only the Garderhöj Fort was square-shaped.
The basic difference of the southern and northern front was the fact, that the southern part was a continuous line, and the northern part were a number of forts supported by artillery. Where the different part of the southern front was supposed to cover its own blind angles,
The forts were covered by the batteries behind the forts. These batteries were also supposed to cover the rear of the forts.
The Gladsaxe Fort
The Lyngby Fort
The Garderhöj Fort
The Fortun Fort
The Bagsværd Fort
The Taarbäk Fort
The Tinghoej Battery
The Buddinge Battery
The Vangede Battery
The Gentofte Battery
The Bernstorff Battery
The Ordrup Krat Battery
The Christiansholm Battery (Really a fort)
The attacking enemy was led towards the fort line by major floodings. These floodings was covered from some of the batteries and the four infantry positions:
The Dyrehave Position
The Baunehoej Position
The Hovmark Position
The Vintappergaard Position