Complex sentence: His plea for leave being denied, Nian was, at the end of May, transferred to the post of Tartar General at Hangzhou, and the armies he once commanded went under the control of Yue Zhongqi.
Split into simpler sentences: His plea for leave being denied, Nian was, at the end of May, transferred to the post of Tartar General at Hangzhou. The armies he once commanded went under the control of Yue Zhongqi.