Which mechanical effect necessitated the design of staggered or offset gatehouses in Roman fortifications?

💡 Explanation

When aligned gatehouses are breached, the 'funneling effect' concentrates attacking forces internally because the linear path creates an easy access point. Staggered gatehouses disrupt this flow by inducing a redirection mechanism for projectile impacts. Therefore, staggered design emerges, rather than others which address entirely different issues.

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