Which structural issue commonly arose when Roman fort designers failed to ensure proper drainage behind defensive walls?

💡 Explanation

When drainage wasn't properly accounted for behind Roman defensive walls, hydrostatic pressure buildup caused walls to progressively tilt outwards because water pressure exceeds the wall's resistance. Therefore outward tilting results, rather than sinkage, hinge corrosion, or fire susceptibility which result from different causes.

• Which soil consequence occurred initially when pre-Columbian chinampa agriculture was established in shallow lake environments?
• Which condition necessitates terraces incorporating specific drainage systems in pre-Columbian Andean agriculture?
• Which water management adaptation helped sustain chinampa agriculture productivity in highland Mesoamerica?
• Which consequence resulted from 'hogging' experienced on long wooden sailing ships in the 18th century?
• Which risk dramatically increased with widespread adoption of bronze metallurgy in ancient city-state conflict?
• Which mechanism most contributed to shot consistency in 15th-century trebuchets during sieges?