Complex sentence: Turgei took part in most of the campaigns in Hong Taiji's reign, and was highly regarded for his bravery, especially in 1640 when he defended the emperor's headquarters against a nocturnal attack by the forces of Hong Chengchou.
Split into simpler sentences: Turgei took part in most of the campaigns in Hong Taiji's reign, and was highly regarded for his bravery. Especially in 1640 when he defended the emperor's headquarters against a nocturnal attack by the forces of Hong Chengchou.