Pearson Scott Foresman
published on 02 February 2014
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.
Based on Wikipedia content that has been reviewed, edited, and republished. Original image by Pearson Scott Foresman. 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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