During a prolonged siege, which outcome accelerates when saps undermine a stone fortification's walls?

💡 Explanation

Increasing underground saps near a fortification weaken the foundation via undermining, accelerating wall degradation due to reduced load bearing support. Because the center of mass is negatively affected, rotational shear contributes to collapse in sections where joints break apart, therefore heightened wall crumbling transpires faster, rather than liquefaction alone contributing.

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