Catapults were eight feet tall. This picture of a catapult shows how they looked in early times. The special development that turns the catapult into what we consider “The Swinging Arm”. To make a catapult what it is, you have to mount it on a pivot. The catapult was used first by the Greeks, Roman, and Chinese. Diodorus Siculus, a Greek historian, was the first person to write down the firing of a mechanical catapult, early Ballista, in 399 B.C.E. Catapults were used in England in 1216, during Siege of Dover. The French were the first to use catapults on the English soil. For war, they used catapults for launching missiles and other objects. Catapults were used throughout Europe, until 885-886 A.D. because they created new technology that was stronger than catapults. Mangonel catapults work by turning a rod that is connected to ropes,that hold the potential energy and releases using the kinetic energy to throw an object. When it fires, it fires at a 90° angle and throws the object. The parts of a catapult is the bucket; which holds the object that will be thrown, the payload; the object, the arm; the part of the catapult that moves to throw the object, the rope; the support for the arm because if the arm is all the way to the ground, the catapult will not work, restraining rope; the rope that supports the bucket so it doesn't fly off the arm and off the catapult, cantilever-type spring; the object that