Another significant challenge Cixi faced was the increasingly decrepit state of the Manchu elites. Since the beginning of Qing rule over China in 1644, most major positions at court had been held by Manchus. Cixi, again in a reversal of imperial tradition, entrusted the country's most powerful military unit against the Taiping rebels into the hands of a Han Chinese, Zeng Guofan. Additionally, in the next three years, Cixi appointed Han Chinese officials as governors in all southern Chinese provinces, raising alarm bells in the court, traditionally protective of Manchu dominance.