I'm sitting here trying to look up quick information on trebuchets and the improvements that Muslims made to their design when the technology reached them from China... I need to know when they reached Arabia, when the improvements were made and when Europeans were first exposed to trebuchet technology... Because I *know* I've read before that trebuchets were not used as defensive weapons on top of city walls until Saladin took back Jerusalem from the European Crusaders. And I also *know* I've read that Europeans were not exposed to trebuchets until they saw the Muslims using them in the Crusades and that it took French engineers about 40 years to figure out how they worked and how to replicate the technology in a reliable way.
All I can find on the 'net are wiki articles and information on their use and role in the video game Age of Empires, all of which seem to be inaccurate since it says that the technology reached Europe in the 6th century and the technology was developed in China in the 6th century. This is most annoying as I'm trying to finish my paper and my brain is slowly ceasing to function. I'm too tired to keep looking, so I suppose I'll have to leave that out of my paper. Backwater invaders, the Almoravids, are portrayed as using trebuchet in their siege of Valencia in 1099 in the movie "El Cid." I'm supposed to point out all the historical inaccuracies I caught in watching the film. And I'm fairly certain that that is one of them... but since I can't find a *thing* to back me up, I'll leave it out.