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I’ve never heard of it before, but it looks awesome!
Why do the spikes on the bottom wall point inwards as well as outward?
On the other side of the spike wall in an inner moat. I presume the inner spikes help trap people and creates a kill zone. Also arranging spikes in an X pattern is simple to produce.
![[OC] Fort Ligonier, Pennsylvania](https://lemmy.world/pictrs/image/3351da89-e609-4912-b06f-0b4d6959b90f.jpeg){kind=link}