the Qing government as incompetent and cowardly in the face of the Western powers. In 1855, Zhang Lexing took direct action by launching attacks against government troops in central China. By the summer, the fast-moving Nian cavalry, well-trained and fully equipped with modern firearms, had cut the lines of communication between Beijing and the Qing armies fighting the Taiping rebels in the south. Qing forces were badly overstretched as rebellions broke out across China, allowing the Nian armies to conquer large tracts of land and gain control over economically vital areas. The Nian fortified their captured cities and used them as bases to launch cavalry attacks against Qing troops in the countryside, prompting local towns to fortify themselves against Nian raiding parties. This resulted in constant fighting which devastated the previously rich provinces of Jiangsu and Hunan. In early 1856, the Qing government sent the Mongol general Sengge Rinchen, who had recently crushed a large Taiping rebel army, to defeat the Nian. Sengge Rinchen's army captured several fortified cities and destroyed most of the Nian infantry, and killed Zhang Lexing himself in an ambush. However, the Nian movement survived as Taiping commanders arrived to take control of the Nian forces, and the bulk of the Nian cavalry remained intact. Sengge Rinchen's infantry-based army could not stop the fast moving cavalry from devastating the countryside and launching surprise attacks on Qing troops. In 1865, Sengge Rinchen and his bodyguards were ambushed by Nian troops and killed, depriving the government of its best military commander. The Qing regime sent general Zeng Guofan to take command of Qing imperial forces, providing him with modern artillery and weapons, purchased from the Europeans at extortionate prices. Zeng's army set about building canals and trenches to hem in the Nian cavalry — an effective, but slow and expensive method. Zeng was removed from the post after the Nian rebels broke one of his defense fronts. Generals Li Hongzhang and Zuo Zongtang were put in charge of the suppression. In late 1866, the Nian movement split into two — east Nian stayed in central China and west Nian sneaked close to Beijing. By late 1867, Li and Zuo's troops had recaptured much territory from the Nian rebels, and in early 1868, the movement was crushed by the combined forces of imperial troops and the Ever Victorious Army. Du Wenxiu Rebellion The Du Wenxiu Rebellion, or Panthay Rebellion