Almost at the same time, Liao Chuan, who was in the military capital, also received an order to lead 50,000 troops out of Shanggu, Changshan Pass, and Wuruan Pass with him as the general of the expedition to the south. His subordinates controlled Shao Zisong, Yao Chang, Shi Yue and other generals to lead troops and horses, and specialized in the northern part of Taihang Mountain against Yan. Zhao Ji, who was originally in Luoyang, was appointed as the general of Pingdong, and Chen Kang led an army of 50,000 east to attack Chenliu and other counties, trying to take all parts of Yanzhou as soon as possible.

Lü Guang and others in Hanoi also received orders to attack out of Qishui Pass.

In addition, Peng Lin personally led 20,000 light horsemen to Feihu Cheng, and will go south together after meeting with Shao Zisong and others. Liu Xiaohai and Zhao Ji were also equipped with 10,000 light horsemen to accompany them.

And Li Xin himself, he personally led the flying dragon cavalry and the two pro-armies of the Unbroken Army, one person and two horses rushed to Shangdang, ready to participate in the battle at any time.

The military order was issued, and this time the Tang Dynasty mobilized more than 200,000 troops. In addition to these regular army troops, there are also the town troops who will take over the local area in the future, as well as officials, etc., and the materials transported to the front line alone are already an endless stream, which is an astronomical amount.

Fortunately, in the past two years, a large number of supplies have been stored on the front line. Otherwise, relying entirely on transporting them from the rear will be difficult to save the fire from afar, and it will greatly delay the fighters.

And Wang Meng and others, after the order was issued, immediately transferred to the state of wartime. All state affairs began to revolve around war.

There is no doubt that in this war, everyone understood Li Xin's idea, that is, to completely wipe out the Yan Kingdom. For this reason, it can be said that the whole country has come out with all its strength.

A mobilization war of such a scale mobilized the entire Tang Dynasty. Except for the states and counties west of the Yellow River that did not join the war, but only supported materials, the states and counties east of the Yellow River have basically entered the wartime.

All the materials were first transferred to Shangdang and Taiyuan, and then transported to the front line. And the use of Xingyang and other places in Henan Province is also transported from Tongguan.

Li Xin's action can be described as huge. Needless to say, after hearing the news, many people immediately panicked like ants on a hot pot. Many of them began to gather up their soft gold and silver, preparing where to take refuge and wait until the war was over.

For Huan Wen, although Li Xin's action like this is a good thing for him, it is really beyond his imagination. I thought it was just an ordinary war, but who would have thought that it would evolve to this point.

However, he was also careful at this time. Because he didn't know if Li Xin's approach would succeed, after all, the strength of Yan Guo was still there!

Of course, for him, the best way is to settle the war here as soon as possible, and then sit on the mountain and watch the tiger fight, and see if he can make a profit.

At the beginning of May, the Tang army officially attacked Yan in a big way.

Liao Chuan led an army of 30,000 to go out of the capital first, and fought a battle with the Yan army outside the pass. There were more than 50,000 Yan soldiers guarding outside the military capital, and they were led by the new King of Fanyang, Murong De. Because the previous King of Fanyang, Murong You, was assassinated, so he, the Duke of Liang, was promoted.

And Murong Chui, who was in charge of the northern defense line, stayed in Gaoyang Kingdom. Because the northwest of Gaoyang Country is close to Changshan Pass and Wuruan Pass, and to the north, it is only more than 300 miles outside the military capital Pass.

Compared with staying outside the military capital, in Gaoyang Country, he is more able to take care of the entire defense line and take care of the entire overall situation.

In particular, Chang Son Pass and Wu Nguyen Pass are closer to the southern counties, so they must be strictly guarded. Otherwise, even if the generals are blocked in the north, if these two passes are not blocked, it will be almost in vain.

After Liao Chuan led the army out of the customs, he did not stay too much. Because of the matter of exterminating Yan, Li Xin has discussed with them many times in the past two years. Therefore, once it is actually implemented, it is already clear what should be done.

Murong De's 50,000-strong army confronted the Tang army for less than a day before being broken through by the Tang army from the flank. Facing the Tang army, which was strong and equipped with a large number of bows and crossbows, although the 50,000 troops of the Yan army had been trained by Murong Chui, they were far from comparable.

The army, which had no determination to fight, soon became unable to resist it when it saw the Tang army, which had a different style and a clear formation. In addition, Murong De's own ability was also insufficient, and the command of the battle was full of mistakes, and he buried the 50,000 army to the dynasty.

After the large army of the Yan army in Yan County was settled, the Tang army immediately took down Jicheng, the old capital of the nearby Yan Kingdom. This was the first major victory since the beginning of the war, and an enemy town was captured.

At the same time, it was also a bridgehead to attack Yan was established in the south of Taihang Mountain.

After opening the passage, Liao Chuan did not immediately go south and went straight to Murong Chui's army. At this time, he began to divide his troops and attack Yuyang, Beiping, Liaoxi and other counties around Yan County.

Because these counties are located west of Yanshan, there is no need to cross Yanshan to attack, so the difficulty is relatively small.

If he can't occupy these counties first, for Liao Chuan, it is likely to endanger his back road to the south. Especially for the supply of logistics materials, it may be cut off by the remnants of the Yan army.

But if he didn't move, it would be impossible for Murong Trai to sit idly by.

After seeing Murong De defeated and returned, Murong Chui hurriedly mobilized 70,000 troops from all over the place. Then, it is concentrated in the west from Fanyang Guoyu County, to the east through Zhuo County, Changxiang County, to Yan County's Anci County, Quanzhou County, all the way east to the sea on this straight line.

Among them, the reason why Yuxian County will become the starting point is because it is dozens of miles west of here, where the Wuruan Pass is located. Originally, there was to garrison the Tang army to go out of the pass, but at this time it happened to be connected.

Anci County is the later Langfang City, and Quanzhou County is near the north of Tianjin.

Because the coastline at this time is actually much closer than in later generations. Therefore, the distance after these counties are connected is much shorter than that of later generations. With 70,000 troops deployed on this line, Murong Chui's thoughts are self-evident.

Obviously, he wanted to rely on these cities, so as to block Liao Chuan's troops and horses in the north, so that he could not attack the area south of Fan Yangguo.

After all, it was impossible for Liao Chuan to let the 70,000 army behind him and go south to attack other places regardless of it, unless he was arrogant and invincible, otherwise this was the way to die.

And once he was dragged on this line, Murong Chui would be able to calmly deal with the soldiers and horses heading south from Changshan Pass and Wuruan Pass. He knew very well that although the forces in his hands had a numerical advantage, if he really wanted to fight, he might not have any chance of winning.

You have to use stratagem to convert your superiority in strength.

Because Liao Chuan was going to attack Yuyang and other counties, he gave Murong Chui enough time to complete this deployment.

By the time Liao Chuan reorganized his army and went south, this line of defense to intercept him had already been deployed. Moreover, Murong Chui personally sat on this line of defense, taking into account Wuruan Pass and Changshan Pass at the same time.

However, Liao Chuan did not panic, at this time, except for some soldiers and horses left behind in Jicheng and other important places, the remaining more than 25,000 people were all brought down by him.

The town troops in Shanggu, Yanmen, Daijun and other places in the rear have already begun to go out to take over Yanjun, Yuyang and other places, which can be regarded as relieving Liao Chuan's worries.

Because Murong De's army was defeated too quickly, there were many frightened Yan officials from all over Yan County who surrendered in Kaicheng. In this way, it only took Liao Chuan about half a month to basically take down the remaining six counties in Youzhou except for Fan Yangguo.

On May 20, Liao Chuan led his army out of Jicheng and entered Guoliangxiang County, Fanyang.

Liangxiang County is located at the foot of the eastern foot of Taihang Mountain, and if you go west from here, it is Yesanpo. About 50 miles to the south, there is Zhuo County, the capital of Fanyang State, Changxiang County in the southeast, and Yu County in the southwest.

Liao Chuan himself led an army of 10,000 here, and the remaining 15,000 troops were divided into troops to Anci and Quanzhou County. Basically, he alone restrained the Yan army in Zhuoxian and other three counties.

After all, he is the general of the Tang Army's expedition to the south, and for the Kaiyan Army, he is a figure of sufficient weight and must be valued. It just so happened that Murong Chui was sitting in Zhuo County, so he confronted him.

Murong Chui was relatively cautious, and did not see that Liao Chuan's troops were less than his own, so he sent troops to attack the other party. After all, in this situation, the most important thing for you is to gain time, and it would be best to wait until the war in the south is over.

Anyway, as long as he strictly guards this line of defense and waits for the opportunity, the more beneficial it will be to himself when the Tang army is impatient. At this time, the Tang army was in full swing, and it was not a good idea to take the initiative to attack on his own.

After Liao Chuan observed in Liangxiang County for two days, he also understood Murong Chui's thoughts. But he didn't mean to go south immediately, because this time he didn't have to go all the way.

Just three days after he arrived in Liangxiang County, Shao Zisong and Peng Lin moved from Guangchang County. Peng Lin led 10,000 cavalry and 10,000 foot soldiers to go out of Wuruan Pass with Shi Yue's soldiers, putting pressure on Murong Chui and wanting to join Liao Chuan after he came out.

Shao Zisong and Yao Chang led 20,000 horses and rode out of Changshan Pass, preparing to take advantage of Murong Chui's confronting Liao Chuan and Peng Lin's containment to take Zhongshan Kingdom and Changshan County in the south first.

If this step is successfully completed, then Murong Chui's army will be encircled by the north and south of the Tang army's 60,000 troops. At that time, the defense line of the Yan State in the north will be completely broken, and it will no longer be able to block the Tang army.