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In spring 537, Gao Huan launched a major attack three-pronged on Western Wei, commanded by himself and his key generals Dou Tai (竇泰) and Gao Aocao (高敖曹), intending to draw Yuwen's troops to himself while having Dou advance deep into Western Wei territory. Yuwen, pretending to be ready to abandon Chang'an to withdraw to modern eastern Gansu, instead launched a surprise attack on Dou's troops, slaughtering most of them. Dou committed suicide. Gao Huan and Gao Aocao were forced to withdraw. In counterattacks, Western Wei took modern western Henan and southwestern Shanxi.