In the northland grasslands, crops are planted only once a year, ploughed at the end of March, and by the end of August, the grain has been harvested and put into the warehouse.

In autumn and winter, when the farming season is slack, the tun troops in various tunbao will naturally gather together as usual for military training. The Beidi Tun Army is mainly military, and the Tuntian is just a sideline, so it is good to be able to ensure food self-sufficiency. In the past few years, with the planned implementation and expansion of the Tuntian area in various parts of Bashang, the military town of Zhangbei was able to mobilize more than 70,000 troops, including 40,000 Han troops and more than 30,000 soldiers from various grassland tribes.

Zhang Beizhen sent Wu Luan to the front line and commanded the battle in Guyuan City on the bank of the Lightning River.

The tunpu on the dam has learned the lesson of the previous Xinghe part of the tunbao was breached, and it was built very tall and strong. The four cities centered on Guyuan City can only be separated by more than 30 miles from each other, and they can help each other, and it is not easy for the Khitan army to break through the fortified area in this area and march into the dam.

Yelu Lihu and Jelu Sago led a large army along the Huangshui River to cross the mountains and join the Xi army led by Xiao Wei, the king of the Xi tribe, who had recruited the Northern Blockade Army, and the soldiers and horses reached nearly 150,000 people. In this westward expedition, he prepared to recover the grassland on the dam that had been lost due to his defeat.

He is an extremely conceited person, and the defeat in Jining more than two years ago was a great shame for him. Moreover, the Nanren also built two cities there, one named Desheng City and the other named Huade City, and after hearing the names of these two cities, Li Hu had an urge to raze them.

After hearing that the emperor of the Tang Kingdom was the same age as herself, the Empress Dowager Shulu often compared the other party with herself, which also made Li Hu's heart even more unbalanced.

The Tang army's sudden expansion into the northland grasslands disrupted the Khitan's original decision to conquer the Hetao and the Dangxiang Qiang Department first, and then the Central Plains. The loss of the grassland on the dam also disrupted Yelu Deguang's original military deployment and expectations. Originally, it was not easy for the Khitan army to conquer Yunnei and Hetao in the west, but now the Tang State has built two barriers, making the Khitan people's plan completely a dream.

The Xilou grassland, where the Khitan people flourished, was rich in water and grass, coupled with the fertile land and abundant grain production of the Bohai Kingdom in Dongdan, which was the foundation of the Khitan State's prosperity. However, when the army crossed the great army and marched westward, it was faced with a large desert, because of the long distance, the supply of grain and grass and other reasons could not be besieged for a long time.

And the Tang army's construction of cities in the water source was aimed at this weakness of theirs.

The most unbearable thing for the Khitan people is that because of the existence of defenders in Guyuan City and other places, the Khitan army does not dare to enter the hinterland of the western grassland.

The snow is vast, and the families of the Tun army in the grassland of Bashang and the old and weak women and children of the grassland tribes are all under the organization of the government, braving the wind and snow, driving cattle and sheep, from Zhangbei Swallow City, through the newly opened avenue of Yehuling, to Zhangyuan, and to Shanbei. And all the young and strong were incorporated into the Zhangbei Town Army, leaning on the city and refusing to defend it.

The sky and the earth are vast, and on the snow-covered fields, the Khitan army like a tide, like a black torrent, is surging along the Lightning River valley in the direction of Guyuan City. More than 100,000 cavalry troops, boundless, like the sound of horses' hooves like thunder, broke the silence between heaven and earth, rolling in.

The prosperity of the Khitan Dynasty in the grassland was accompanied by the weakening of the Central Plains Dynasty, and this alternation of rise and fall is almost a historical inevitability, and the cycle is endless......

Wu Luan, the envoy of Zhangbei Town, stood on the five-zhang high tower of Guyuan City, looking at the Khitan cavalry rushing to the northeast, his expression was solemn and quiet, and on the snow-capped field, the black torrent was spreading from a distance to the city.

He was born as a scholar, but he has been in the army for more than ten years, and now he is only thirty-two years old, but he has surpassed many generals from Shatuo and achieved a position equivalent to a town festival, all thanks to the young emperor's trust in him. In the past ten days, he frequently issued various orders, arranged for the old and weak women and children in the area under his jurisdiction to retreat, deployed the defense of various cities, and prepared for a desperate and bloody battle to keep the enemy out of the country.

The empire is still in a state of division, although in the past few years, the strength of the country has not allowed to take the initiative, but the emperor often said, "Those who dare to offend my Tang Dynasty will be punished even if they are far away", but they always inspire the confidence of the soldiers.

Tens of thousands of Khitan vanguard cavalry troops have been rolling in from the north.

Wu Luan had already ordered the defenders to abandon the frontier forts and withdraw all of them into several border military cities, preparing to hold on to the cities.

Under Guyuan City, the Khitans did not immediately launch an offensive under the city as before, but first set up camp and began to assemble siege equipment.

Since the end of the Tang Dynasty, the Khitan people have been going deep into Shanbei and Hebei from time to time to raid, coupled with the conquest of the Bohai State, and have transformed from the original nomadic tribe into a semi-agricultural and semi-pastoral country. With the increasing number of Han craftsmen under his rule, the Khitan army, which was not good at attacking cities, came with a large number of siege equipment this time.

Wu Luan put down the telescope in his hand and knew that a westward advance of the Khitans was obviously prepared. The walls of this Guyuan City have built more than a dozen watchtowers poured with concrete, which are certainly stronger than the original grassland cities that are completely rammed with loess, but how long they can hold on, he has no bottom in his heart.

Since he dared to come here, he was ready to sacrifice, and what awaited the soldiers defending the city would be a hard and long battle......

……

Mandarin duck park, swallow city.

From time to time, there are war horses galloping outside the military office, passing all kinds of news, and all kinds of intelligence from the Northland Grassland are gathered here. What is surprising is that Lu Wenjin, who was the envoy of the Yanmen Festival who defected from the Khitan, was appointed by Li Qi to recruit envoys to the north, responsible for commanding the army in the north and commanding the battle in the north.

Li Cunshuo strode in from outside the courtyard, the military camp of the Weisai Army was stationed outside Muma City at this time, and the more than 10,000 cavalry troops were the only mobile force in Lu Wenjin's hands at present.

"Li Hu's army has been attacking Guyuan City and Wild Horse City since yesterday." Li Cunshuo said after entering the door.

"Guyuan City and Mustang City were not so easy to be breached, and now that the Khitan morale is strong, we need to kill their fighting spirit under the city first." Lu Wenjin said quietly, "The Son of Heaven has ordered the garrisons in Hetao, Yunzhou, Wuzhou, and Zhangyuan in Shanbei to reinforce us, and we must wait until the reinforcements arrive before we can launch a counterattack." ”

"We can't just watch here, the Khitans are so terrible, just do it." Li Cunshuo said.

Lu Wenjin's expression was slightly stunned, then he reached out and took a military report, and said to Li Cunshuo: "The meaning of the Son of Heaven is not just to repel the invading enemies, but to annihilate them, this is an edict that has just been transferred from Shanbei. Yelu Deguang's main force has arrived in Youzhou, and the Khitan Shangjing should not have many troops, as long as Li Hu is annihilated, our army can go straight to Xilou......"

Li Qi's order was to encircle Wei to save Zhao and force Yelu Deguang to withdraw his troops from Youzhou, and Lu Wenjin stayed in Khitan for more than ten years, and was more familiar with the situation in Beijing, but he moved the mind to make an immortal deed......

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