On May 27 of the twenty-fifth year of Emperor Chongzhen, Li Dingguo, having received his supplies, formally launched his campaign against Hetu Ala.
Because the terrain of Hetu Ala was exceptionally narrow, there was simply no room for cavalry to maneuver. Consequently, infantry became the protagonists on the battlefield. Li Dingguo arrayed his infantry in lines from north to south, advancing slowly from west to east.
The cavalry did not remain idle. A portion stayed behind the infantry to prepare for sudden raids and pursuit, while the rest dismounted to climb the hills, cooperating with the infantry to fight for control over every ridge.
Chapter 1178