Overview: Follow Stuart Prior and Monty Halls, in exploring the destructive power of Siege Engines in history. Sieges are as old as warfare itself, like Alexander the Great's siege of Tyre, the Siege of Acre in 1191, right up to the modern day. As recently as 1992, the largest ever modern siege occurred in Sarajevo as the city was pounded for four years. Monty and Stuart follow the building of a mangonel, and trebuchet, in order to test their power and accuracy.