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The Gastraphetes (from"belly Bow")was a hand-held crossbow used"by the ancient greeks.it was described in the first century AD by the Greek author Heron of Alexandria in his work Belopoica,which draws on an earlier account of the famous Greek engineer Ctesibius.
The ballista (''throw '') ,was an ancient missile weapon which launched a large projectile at a distant target.Developed form earlier Greek weapons,it relied upon different mechanics, using two levers with torsion spring instead of a prod ,the spring consisting of several loops of twisted skins.
The onager was a Rome siege engine,which derived its name from the kicking action of the machine. It is a type of catapult that from twisted rope,to store enery for the shot.The onager consisted of a large frame placed n the ground to whose front end a vertical frame of solid timber was rigidly fixed;through the vertical frame ran an axle, which had a single stout spoke.
375 b.c.
285-222 b.c.
The oxybeles(''Bolt shooter") was a weapon used by the Ancient Greeks starting in 375 B.C. .The weapon was basically an oversized gastraohetes, a composite bow placed on a stand with a stock and a trigger
A trebuchet is a siege that was employed in the middle ages it is it is called a counterweight trebuchet'' or "counterpoise trebuchet" in order distinguish it from an earlier weapon that has come to be called the"traction trebucet",the original version with pulling men instead a counterweight.Man-powered trebuchets appeared in the Greek world and China in about 4th century BC.
a mangonel(''engine of war'')was a type of catapult or siege machine used in the medieval period to throw projectile a castle's walls.The exact meaning of the term is debatable,and several possibilities have been suggested.It may have been a name for crticular type or one counterweight artillery,possibly either a men assisted fixed-counterweight type,or one with a particular type of frame.