Complex sentence: He first sent Zhang He, Zhu Ling and others to lead a force to attack the Di tribes blocking the way in Wudu (武都; around present-day Longnan, Gansu) and later defeated and massacred the Di population in Hechi (河池).
Split into simpler sentences: He first sent Zhang He, Zhu Ling and others to lead an army to attack the Di tribes blocking the way in Wudu (武都; around present-day Longnan, Gansu). They defeated and massacred the Di population in Hechi (河池).