Fourth and Second Army Corps were put at the Grebbe Line; Third Army Corps were put at the Peel-Raam Position with the Light Division behind it to cover its southern side. Brigade A and B were positioned between the Lower Rhine and the Maas. First Army Corps was a reserve in the Fortress Holland, the southern edge of which was protected by another ten battalions and the eastern side by six battalions. All these lines were protected by pillboxes.