Heavy shields
A Heavy Shield is a large, wooden, rectangular shield, with a center boss and a curved shape. It closely resembles a Roman scutum. It is a Resource used to train certain units.
Heavy shields are unlocked by the Heavy shield knowledge this knowledge comes around in the Iron age.
To make 1 Heavy shield you need 1.5 Wood, 1.5 Leather and 1 Iron or 0.5 Steel.
Units that require Heavy shields in order to be recruited