Answer
Sun Quan's forces ambushed and captured Guan Yu, a renowned general in the Three Kingdoms period of China. This ambush occurred during a battle between Guan Yu's forces and Sun Quan's army. Guan Yu was lured into a trap by Sun Quan's general, Lü Meng, who pretended to surrender. Guan Yu's forces were then ambushed by Sun Quan's troops, leading to Guan Yu's capture.