When besieging a walled city, which outcome results when Roman sappers undermine a wall without adequate shoring?

💡 Explanation

Tunnel collapses under undermined cities lead to localized wall collapse because concentrated stresses exceed material strength. The mechanism is induced stress concentration, therefore the wall fails vertically above the tunnel rather than exhibiting distributed failure.

• Which outcome often occurred within a pre-Columbian aqueduct system when maintenance declined amid expanding maize cultivation?
• Which agricultural consequence occurred when pre-Columbian chinampa farmers experienced prolonged flooding during maize cultivation?
• Which risk increases when bronze tools used to cut limestone blocks exhibit high tin content?
• Which limitation arose when early Islamic scholars applied algebraic methods to astrolabe design?
• Which risk increases when a square rigged 18th-century warship heels excessively during heavy weather?
• Which environmental constraint primarily limited the expansion of chinampa agriculture in the Valley of Mexico during pre-Columbian times?