The ballista was a Roman artillery weapon which used torsion to propel bolts or stones over several hundred metres. They were in use from the 3rd century BCE to the 4th century CE.
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Original image by Vissarion. Uploaded by Mark Cartwright, published on 02 February 2014 under the following license: Public Domain. This item is in the public domain, and can be used, copied, and modified without any restrictions.
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