Among the Twelve Deceptive Stratagems recorded in The Art of War · Initial Estimations, Sun Tzu put forward a lethal psychological warfare tactic: Divide the united enemy (親而離之).
This article narrates the tragic fate of Ming general Yuan Chonghuan. Trusted by Chongzhen Emperor, he defended Liaodong against Later Jin. He executed unruly general Mao Wenlong. Hong Taiji used a false conspiracy to frame him. Paranoid emperor sentenced Yuan to cruel death, ruining Ming’s last hope.