Yu Anhui, the centurion of the Chengying battalion, leaned on the railing of the Lanzhou marching cart, looking at the towering and rugged mountains on both sides of the Hexi Corridor, and secretly shouted in his heart, sighing, such a dangerous terrain can resist the tribal cavalry of Mobei and Qingtang, so that the Han people also have a place to live and work in peace and contentment in this northwest frontier.

The 9,000 Lanzhou troops marched from Ganzhou along the narrow plains of the Hexi Corridor with the families of the Uighur nobles and their dependents.

This long and narrow plain in the west of the river starts from Wusheling in the east and reaches Yumen Pass in the west, because it is located in the west of the Yellow River, so it is called "Hexi Corridor". The Qilian Mountains and Altun Mountains in the south, which are covered with snow all the year round, block the way for the Qingtang Tubo athletes to go north, and the Mahair Mountain, Heli Mountain and Longshou Mountain, which are difficult to climb over in the north of the Mobei Mountains, enclose this section of about 2,000 li long, the narrowest point is only less than 20 li, and the width is 200 li. The land of Shashu Prefecture, the climate is mild, the water and grass are abundant, suitable for agriculture and animal husbandry, if there is no war and invading, under the arch of the high mountains in the north and south, it is a rare paradise, but if it encounters a military disaster, the people can not escape, and the Hexi Corridor is also a hell for adults.

The marching cart was shaky, Yu Anhui was quite comfortable, he was the head of the imperial court to control the crane army, but he coveted the reward of the border army athletes, and when he arrived in the border town, after the death of the old Jiedu envoy, there was nowhere to live, and it happened that Zhang Zhongyao recruited troops on behalf of the Lanzhou caravan, so he was accepted. Although the Lanzhou army was extremely hard-working, there was a style of never standing while sitting, which was completely different from the habit of the Zhao and Song Dynasty courts to transfer various troops to and from place when they had nothing to do. "They just can't get used to seeing the soldiers live a comfortable life. Yu Anhui, who arrived in the Lanzhou Army, once recalled. Take the march as an example, the ten-member team of the Lanzhou Infantry Barracks is each equipped with two four-wheeled carriages, one of which is loaded with the baggage of the whole team of sergeants, and the other is carried by four sergeants, and half of the sergeants are always resting on the car, even if it is a long march, the physical strength of the sergeants is maintained very well.

When he was extremely bored, a bunch of sergeants were affected by the style of the Daxing military strategy in the Lanzhou army, and began to plan the march strategy to Suzhou this time, and Zhong Tong, a sergeant of the Chengying Battalion who was born in Guannan, first said: "I see that the mountains on both sides are towering, and the deep valleys are secluded, which is an excellent place for ambushes. "Zhong Tong is a sharpshooter, born with long hands and long feet, but slightly thin, fair skin, thin lips, a short beard on the lips, in the Guannan Army has a reputation of "Little Yuki", he has a face, although he is only a ten-captain, so point-in-command, but has the temperament of a commander.

Yu Anhui sighed slightly in his heart, the centurion of the infantry camp originally had a horse, and he was reluctant to ride his own war horse, so he cheekily took turns to ride each team of ten, claiming to share weal and woe, but he couldn't lose the face of the ten-man captain in the ten-person team, so he couldn't help but refute Zhongtong. But Wang Sihai, another fierce soldier in the ten-person team, couldn't help it, he was not lost to Zhong Tong in hand-to-hand combat, when the Chengying battalion competed to determine the ten-master, Zhongtong only cared about fighting around, releasing cold arrows to kill and injure his comrades, and got the position of the ten-captain.

Wang Sihai rubbed his sharkskin scabbard, which was a saber taken from a nobleman of the Bohai tribe in the Liao army, and sneered: "Although I have not been in Lanzhou for a long time, I have been forbidden by the sergeants of all battalions, and I am well-trained on weekdays, even if it is the time for light cavalry galloping for five miles, it is enough for each battalion to form a formation to protect itself, and expand the search range of the reconnaissance cavalry at will. He looked at the continuous mountains and said in a deep voice: "If the idle army is lurking within five miles of the grassland cavalry, it will inevitably be chaotic, but if it is my Lanzhou army, they are miscalculated." Between the words, this soldier who has only joined the Lanzhou military system for only three months actually exudes a feeling of pride in the Lanzhou army, which is also the general mentality of the Lanzhou soldiers, the sergeants have the highest social status and the best treatment in the Lanzhou system, these two things, whether it is the arrogant and domineering feudal town soldiers or the well-fed imperial forbidden army, have never had at the same time.

Although Lanzhou does not refuse to win by surprise, for example, this thousand-mile attack on Ganzhou is a model, but the whole army pays more attention to forming a strong formation, fighting to the death, and advocating courage the most, and the commander Wu Yingying said: "Intrigue and trickery are only suitable for dealing with those soft egg armies, and my brave people in Lanzhou form a formation, and the more the enemy plays trickery, the more vulnerable he is." This sentence epitomizes the attitude of the Lanzhou army towards battles and tactical movements, baggage, marching, and combat are interlinked, if the battalions on the march cannot complete the formation within five miles of the light cavalry, then the reconnaissance cavalry will inevitably go forward and search farther away.

Zhong Tong was robbed of a white sentence by Wang Sihai, seeing that all the sergeants seemed to agree with Wang Sihai, he was angry in his heart, he was also a ten-captain who relied on martial arts to ascend to the throne, but he didn't think about conspiracy and trickery, and the rules in the Lanzhou army did not allow officers to take revenge on his subordinates, so he had to take out a hard bow he carried with him and pull it, aiming at the valley covered by the mountains, and said secretly, no matter how much you know, you are just a big-headed soldier, if there is really a thief who doesn't know what to do later, and let you see Xiao Yuji's means. Suddenly, Zhong Tong's eyes lit up, and six miles to the north, in the secluded valley, a group of Uighur light horsemen had really turned out, and they were desperately beating their horses and rushing towards the long Lanzhou marching column.

"Enemy attack!" Yu Anhui shouted after being stunned for a while, grabbed his bow and arrows, and shouted for the sergeants in the team to get out of the car to meet the battle.

At the same time, the Uighur cavalry governor Shi Xiutu was leading more than 1,000 of his cavalry to rush towards the Han marching column, his heart full of joy and passion for victory. Shi Xiutu was one of the ten Uighur governors of Ganzhou, and this half-way ambush plan was dedicated to Jingqiong Khan. The Uighurs from the steppe tribes were not as dignified as the Han Chinese, and ambushing the migrating hostile tribes was the specialty of the steppe cavalry, which later evolved into ambush caravans, ambushing the marching Han army, and the steppe cavalry, like a hurricane rush, was the best at creating a mountain and a sea of might, deterring the enemy, taking advantage of the enemy's panic and not forming a formation, to avoid huge casualties with light cavalry to impact the tight formation, and defeat the Han army with a similar number, or even far more than its own number.

In some respects, there was a consensus among the Uighurs, and Jingqiong Khan was quite satisfied with Shi Xiutu's ambush plan, and immediately ordered another governor, Gao Kegong, to lead a thousand soldiers to pretend to be a large army to live in front of Yumen Pass, and led 7,000 soldiers and horses to return to the division at night, and gathered more than 10,000 cavalry from Suzhou, and ambushed on the road from Ganzhou to Suzhou, which was only more than 50 miles wide from north to south.

Seeing that the Uighur cavalry rushed out of the valley like tigers descending from the mountains, brandishing scimitars and shouting in the name of the guardian gods of various tribes, the Great Khan of Yaoluo Ge Jingqiong could not contain his excitement, climbed to the top of a mountain peak in the Horsehair Mountains, where the king's tent was located, and shouted: "Put up my royal banner and let the warriors see that the Great Khan of the Uighur tribes of Ganzhou is with them!"