Tacitus on Plunderers

Someone who uses fear or violence to steal a person's property.

"The people of Oeea, who were inferior in numbers, had summoned to their aid the Garamantes, a wild race incessantly occupied in robbing their neighbors. This had brought the Leptitani to extremities; their territories had been ravaged far and wide, and they were trembling within their walls, when the Garamantes were put to flight by the arrival of the auxiliary infantry and cavalry, and the whole of the booty was recaptured, with the exception of some which the plunderers, in their wanderings through inaccessible hamlets, had sold to more distant tribes."

Tacitus, Histories (100 AD).