Encyclopedia of historical weapons - Baculus
In terms of semantics, a baculus is defined as a staff, especially one that symbolizes authority. The term baculus, or baculum, is Latin for staff. Used in combat throughout Europe until well after the middle ages, the baculus was a heavy, hardwood club with a knotty head used for striking. While not as durable as a metal headed mace, the baculus could still inflict significant concussion damage to an armored or un-armored opponent. It was a popular weapon among conscripted soldiers because it was a relatively inexpensive weapon and easily obtained. It was common practice for soldiers using a baculus to carve and engrave the wood with pictures and marks recounting battles in which they had fought.
