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Most soldiers were right-handed. As they ascended the clockwise spiral staircase, defenders had more space to wield their weapons with their dominant hand, while attackers found their dominant arm (the right) restricted by the central wall of the staircase.

This design forced attackers, who were predominantly right-handed, to fight in a more confined space with their attacking arm closer to the central axis, significantly limiting their maneuverability and effectiveness.

Additionally, the narrowness of the stairs restricted the number of attackers who could ascend simultaneously, making it easier for a smaller group of defenders to control and protect the area.