Counterweight trebuchets were the most powerful ballistic weapons of their day, but their association with later siege guns has led to misunderstandings of their destructive capabilities. This article is an attempt to correct some misguided ideas by providing a short overview of the power and value of mechanical artillery and contextualizing its use in the Levant during the twelfth and thirteenth centuries. After addressing the origin of certain theories that these engines were far more destructive than seems to have been the reality, a brief assessment of their actual power is conducted by looking at the ways sources exaggerate the destructive capabilities of these weapons and exploring their capacity as energy systems. The notion that counterweight trebuchets were responsible for a ‘revolution’ in fortification design from the late twelfth century is then addressed. Building on the notion that these machines were less powerful than some have supposed, an assessment of their value is offered by exploring their relative strength, the psychological impact associated with the dangers they posed, and the prestige attached to employing such great engines.