Which structural vulnerability most challenged Roman artillery during siege warfare against dry-stone fortifications?

💡 Explanation

When mortar joints lack cohesion, structural instability occurs because projectiles exploit existing flaws, initiating crack propagation and creating pathways for collapse. Therefore mortar weakness poses the biggest threat, rather than height, slope, or gate strength alone, which can be overcome with more shots or other siege methods.

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• Which risk increased for ships using early sextants for celestial navigation in high latitudes near sunset?
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