Later the Romans used ballista catapults on their warships. Early crew-served weapons were siege weapons, like the ballista, trebuchet, and battering ram. Siege units are of two types&colon; catapults and ballista. Among the most common were the ballista, mangonel and trebuchet. Chinese and Roman armies employed complex military machines including the Ballista and catapult. The Greek ballista was a siege weapon. The relief shows details such as a ballista or catapult. Fortification adds in war machines such as cannon, ballista, and chariots. The FN Ballista is a sniper rifle developed by FN Herstal. Carroballista was an ancient, cart-mounted ballista, a type of mobile field artillery. Perhaps best known are the "ballista", the "onager", and the "scorpio". It was discharged by a ballista as if it were a heavy dart. IGN made points such as slippery ballista controls. Drogon is injured by a ballista designed specifically to wound dragons, but Daenerys is victorious. Given the order, the Macedonians load and fire the ballista.