庞涓
King Wei employed Sun Bin as chief military advisor. Sun Bin had been punished with mutilation of his knees in Wei at the instigation of his enemy Pang Juan. King Wei's commander Tian Ji recruited him to come to Qi. As Sun Bin could not sit on a horse, he refused when King Wei offered him the actual command of the army. Sun Bin wrote Sun Bin's Art of War, in which King Wei and Tian Ji question Sun Bin on strategy and tactics. Sun Bin was influential in devising the strategy for the Qi triumph at the Battle of Maling in 342 BC, which considerably weakened the rival state of Wei. Pang Juan died there. "Late in his reign, he sent out armies against Qin and Zhao."