The ballista (plural ballistae) was one of the first artillery weapons used by the Ancient Greeks.[1] The ballista was invented around 400 BC in the Greek town of Syracuse. It was one of the first catapults, and shot very large and heavy spears far distances.[1][2] The ballista resembled a large crossbow. They were made in different sizes. Smaller ones threw smaller missiles such as scaled-up arrows and darts.
The steps to operating the ballista are:
Ballistae would be used if a weapon that fired light, narrow ammunition was needed.