Which risk increased for Roman legionaries during sieges when using the 'testudo' formation against defenders?

💡 Explanation

When legionaries used the 'testudo' formation employing overlapping shields for protection, their movement was restricted, making them a denser and more static target, increasing the vulnerability to concentrated fire from defending ballista. Therefore vulnerability to concentrated fire, rather than other options such as entrapment, results because restricted movement made escape less feasible.

• Which agricultural adaptation helped pre-Columbian civilizations cultivate maize in arid highland regions?
• Which outcome arises when traditional chinampa systems experience prolonged, elevated flooding during the rainy season?
• While besieging Alesia, which consequence did Caesar's Roman army face when their circumvallation trenches lacked sufficient depth?
• Which consequence resulted when Mesopotamian irrigation canal siltation decreased channel cross-sectional area?
• Which phenomenon limited resolution of early compound microscopes developed during the Islamic Golden Age?
• Which risk increased during 18th century construction of larger wooden warships exceeding material limits?