Some 1,800 years ago, Roman troops used “whistling” sling bullets as a “terror weapon” against their barbarian foes, according to archaeologists who found the cast lead bullets at a site in Scotland.
Weighing about 1 ounce (30 grams), each of the bullets had been drilled with a 0.2-inch (5 millimeters) hole that the researchers think was designed to give the soaring bullets a sharp buzzing or whistling noise in flight.
The bullets were found recently at Burnswark Hill in southwestern Scotland, where a massive Roman attack against native defenders in a hilltop fort took place in the second century A.D. [See Photos of Roman Battle Site and Sling Bullets]