Complex sentence: He later advanced northwest, leading one half of a pincer movement in an offensive against Imperial forces in 1861, however, due to the poor coordination among the Taiping forces, Chen was forced to be on the defensive and eventually forced to withdraw.
Split into simpler sentences: He later advanced northwest, leading one half of a pincer movement in an offensive against Imperial forces in 1861. However, due to the poor coordination among the Taiping forces, Chen was forced to be on the defensive and eventually forced to withdraw.