Hong Chengchou
The Shanhai Pass corridor remained the best invasion route for the Qing forces and therefore the Qing emperor, Huang Taiji, needed to eliminate those Ming fortresses, the first one being Jinzhou. To save the vital fortress, the Ming imperial court sent an army of over 130,000 men under Hong Chengchou to lift the siege. Unfortunately, in a series of skirmishes, Qing forces defeated the Ming army. First, Qing cavalry raided the Ming's granary in the rear, and when the Ming army retreated after it ran out of food, Huang Taiji placed ambush forces along the Ming army's retreat routes and massacred the retreating Ming soldiers at night.