Certainly one of the most successful defenses of a fixed position was by the British at Rourke’s Drift in South Africa in 1879.There is some merit in compelling your enemy to come to you into a killing zone. And then there’s the nightmare of it too. Fort Douamont at Verdun was truly horrifying for it’s French defenders. Their air supply was quickly cut off from shelling and the men literally began to suffocate, their observation posts were knocked out, essentially blinding them and finally a large caliber German shell found the ammunition magazine and bought the roof down on the men, entombing them. Rommel had right when he said “Movement brings victory’’.
They were lucky the Engineering Officer was there the LT from the Borders was stone deaf.