stackyFACTSDigging a basic defensive ditch is standard military practice, but doing it for thousands of miles requires absolutely staggering levels of completely manual labor.
Digging a basic defensive ditch is standard military practice, but doing it for thousands of miles requires absolutely staggering levels of completely manual labor. The entirely highly extensive Moat and Earthworks of Benin are a heavily interconnected network of deeply excavated trenches and massive dirt ridges. Functionally enclosing an enormous area, it actually required significantly more heavily relocated dirt than almost any other ancient megastructure.
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