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The ballista, plural ballistae, was an ancient missile weapon that launched a…

The ballista (Latin, from Greek βαλλίστρα - ballistra and that from - βάλλω ballō, "throw"), plural ballistae, was an ancient missile weapon which launched a large projectile at a distant target.

Evolution of the Roman warship

Dreme battleship Evolution of the Greek Warship, from the penteconter (top) to the Roman imperial quinquereme of the Greek type