Cavalry Logistics: Horseshoes and Nails

Caring for the 3,000-4,000 horses that formed part of William the Conqueror’s army in 1066 [C.E.] required some 8,000-12,000 horseshoes and about 75,000 nails a month, for about 8 tons of iron.

— Al Nofi’s CIC #174 – Strategy Page