"Hand-trebuchet" . "Counterweight trebuchets" . "Muslim trebuchet" . "traction trebuchets" . . . "Trebuchet" . . "Traction trebuchet" . . . . . "hand-trebuchet" . "Trebuchet" . "manjaniq" . "counterweight trebuchet" . "perrier" . . . "Trebuchet#Developments" . "Perrier" . . "counterweight trebuchets." . "Trebuchet#Couillard" . . . . . . . "couillard" . "Trebuchet#Counterweight trebuchet" . . . "Couillard" . "siege weaponry" . "traction trebuchet" . "counterweight mangonel" . . . . . . . . "large siege engines" . "Hand trebuchet" . . . "Counterweight trebuchet" . . "traction trebuchet catapults" . . . . . "trebuchet" .