Reduction Procedures

Cross reference the type of attacker with the type of defending wall. The number before the slash indicates the saving throw, rolled on 1d20, the wall needs to resist the attack. The time period after the slash indicates the amount of sustained attack there must be before the die is rolled; “immediate” indicates that the wall must save every time it is struck. For purposes of these rules, one “day” represents abut 10 hours of sustained bombardment. If the crews are relieved (and they can see their targets) it is possible to perform two shifts of bombardment every 24 hours. If more than one engine is attacking the same section of wall, roll once for each engine. The saving throw numbers assume a wall of average strength and thickness for its type. If the wall is unusually well made (a dwarven fortress with exceptional stone, for example), the DM can allow a saving throw bonus of +1 or +2. Furthermore, an exceptionally thick wall gains a saving throw bonus of +1 for every 50% of extra thickness. A curtain wall 45 feet thick, for example, would gain a +1 saving throw bonus.

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