Which structural vulnerability emerges when a Roman fort wall section is built on unconsolidated reclaimed marshland?

💡 Explanation

When a wall is built on unconsolidated marshland, differential settling occurs because the soil compresses unevenly under the weight, leading to stress concentrations and cracking as the wall attempts to maintain integrity. Therefore cracking occurs, rather than ramming susceptibility, weathering, or water damage which require different environmental or attack mechanisms.

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