Thorn Ge, you don't have to say a word, in these matters, you can listen to Si Yuan more, he knows more about the situation of the Tang people. ”

Yelu Abaoji also knew that his younger brothers didn't have a good impression of Li Siyuan, so from time to time, he would order his younger brothers to be more restrained, but he couldn't say too much.

"Yu Yue, I think what Si Yuan said is reasonable, the Tang people are now making frequent moves to open up land to the outside world. In the Western Regions, the powerful Xizhou Uighurs have been destroyed, and in the southwest, the Nanzhao has also been destroyed for more than 100 years since the founding of the People's Republic of China.

Now the Tang people sent troops to Liaodong and set up the Liaonan Governor's Office, which had to be guarded. Yelu Huolu didn't care about the contradictions between Yelu Tingge and others and Li Siyuan, but directly talked about the actions of the Tang Dynasty in Liaodong.

"Holu, what do you think should be done?" Yelu Abaoji said.

"It's best to strike first and take the initiative to attack to weaken Datang's strength and make it unable to go all out on the Northern Expedition." Jeruhoru suggested.

"Preemptive?" Yelu Abaoji fell into deep thought, "Liaodong, or where?" ”

"In fact, it is best to be Liaodong, where the Tang people have not gained a firm foothold, and it is easier to succeed." Jeruhorus said.

"Brother, we should directly march south with a large army and attack the Andong Protectorate. As long as the Andong Protectorate was breached, the Tang people would have no army to go on a northern expedition. Jerod said.

"It would be nice if the Andong Protectorate was so easy to fight." Jeruhoru retorted.

"Could it be that someone is afraid of the Tang army because he was captured by the Tang people once?" Jerod scoffed.

"What did you say?" At the mention of his capture, Jeruhorus was furious.

"Am I wrong?" Jereme asked rhetorically.

"You..."

"What's the noise? It's been so long, why are you mentioning it? Don't forget what we're here for, not to quarrel. Yelu Abaoji's face was also a little unpleasant.

Seeing that Yelu Abaoji was angry, Yelu and the others shut up.

"Yu Yue, if it is a preemptive strike, you must not forget Liaodong. Otherwise, when the Khitan army goes to war with the Tang Andong Protectorate, the Tang army in Liaodong may attack from behind. Xiao Dilu suggested.

"Si Yuan, what do you think?" Yelu Abaoji still asked Li Siyuan.

"Liaodong must not ignore it, but if it is a preemptive strike, my suggestion is to bypass the Andong Metropolitan Protectorate and attack the Tang Dynasty's Abe Metropolitan Protectorate.

In particular, the Dongxi Governor's Mansion, the Heichezi Governor's Mansion, the Wuzhou Governor's Mansion and the Shan Yu Governor's Mansion. Li Siyuan said.

"Why did you go to the labor division to attack the Tang Anbei Metropolitan Protectorate? What if the Tang Andong Protectorate cut off the way to retreat? Yelu Abaoji said.

"Although the Khitan now has more than 400,000 young and strong, it is not suitable for a full-scale war with the Tang Dynasty. Now that the Tang people are planning the Northern Expedition to the Khitan, what we are doing is to weaken the strength of the Tang people.

Although the Andong Protectorate was the main force of the Tang Army's Northern Expedition, because of the large number of cities, the Khitan warriors were good at riding and shooting, but did not know how to attack the city. Therefore, the result of attacking the Andong Protectorate was to hit the head and bleed in front of the Tang people's city.

And the Tang people's Anbei Metropolitan Protectorate, the land is vast and sparsely populated, and it is not easy for the Tang army to defend, which is suitable for us to fight the grass valley.

Moreover, among the Shatuo tribe, there are many people who are familiar with the road of Daibei, and it is not impossible to break through from the Andong Metropolitan Protectorate to the east of the Tang River, and it is more effective to attack the Anton Metropolitan Protectorate. Li Siyuan said.

Yelu Abaoji's eyes lit up, "Siyuan's method is not bad, but what if the Andong Protectorate cuts off the retreat?" ”

"If you attack the capital of Andong, you will naturally not be able to attack with all your strength, mainly to fight the grass valley, five to 100,000 cavalry will do, and the Khitan army will still be used to defend against the Andong capital.

Although the cavalry of the Tang army is strong, it is not as flexible as ours, as long as we fight the grass valley and retreat, the Tang army will be helpless.

If we come a few more times, the Tang people will be tired of guarding and their strength will decline, and when the time comes, it will be just right for us to attack the Andong Protectorate. Li Siyuan knew well that the Central Plains Dynasty was inadequate in fighting against the nomads outside the Saiwai, so as long as he controlled the initiative, he would have mastered the magic weapon to win.

"It's easy to say, what if the Tang people retaliate?" Jerod said.

"Wouldn't it be that if we don't loot, won't the Tang people attack the Khitan?" Li Siyuan retorted.

"This..."

Jerod was speechless for a moment.

"I think Si Yuan's suggestion is very good, how to counter the Tang people, we have to study carefully. It's winter, so it's not suitable for war, and we'll have to wait until the next year's snow melts. Regarding Li Siyuan's suggestion, Yelu Abaoji was also very moved.

He has just taken over as Yu Yue and needs to consolidate his position, and a big win is undoubtedly the best option.

Either attack the Bohai Sea, or attack the north of the Murwei or the Yan Ya, but Yelu Abaoji wants to find a place in the Tang Dynasty.

"Yu Yue, if we attack the Tang Dynasty, we still need to convince the Great Khan and the other seven departments." Xiao Dilu reminded.

"There's no problem on the Khan's side, you just need to convince the other seven. The land of Datang is extremely rich, and I believe that for the prosperity of Datang, the other seven departments are also very greedy, and it is not difficult to convince them. "Yelu Abaoji is very confident.

Li Wenzhong, Yang Shihou and others did not know about the ambitions of the Khitan, although it was winter, the Liaonan Governorate and the Pyongyang Governor's Mansion did not stop.

After Yang Shihou withdrew from Nanjing, the Bohai State, he got in touch with the Liaonan Governor's Mansion and opened up the previous contact between the two Governor's Mansions, so as to facilitate the mutual cooperation and combat in the future.

Therefore, Li Wenzhong sent 15,000 troops from Jili Prefecture, passed through Shicheng, and attacked Daxing City; Yang Shihou commanded 10,000 troops to set out from Pyongyang, pass through Anju, and attack Bozhuo City.

The Goguryeo army that defended the two cities finally chose Kaesong to surrender, and they lacked the support of the Balhae State and did not have enough confidence in the face of the attack of the Tang army.

With the capture of Daxingcheng and Bozhuo Fortress by the Tang army, the Liaonan Governorate and the Pyongyang Governorate were also bordered, and the Yalu River was bounded, with the western bank being the jurisdiction of the Southern Liaoning Governorate and the east bank being the Pyongyang Governorate.

There is no doubt that with the two governors opening up the land connection, the imperial court was excited. The radicals even proposed that they should immediately send troops to the north to attack the Khitan, because the Liaonan Governor's Mansion and the Yingzhou Governor's Mansion under the Andong Protectorate were separated by the Khitan, to be precise, by the Khitan affiliated tribe Dongxi Shulu clan.

But some people feel that they are a little too anxious, because the Governor's Office of Southern Liaoning was initially established, and it has not yet formed a real control over all parts of Southern Liaoning.

As for whether to go on the Northern Expedition to the Khitan, Li Ye has not yet considered it.

But just when he hesitated, the Khitan side couldn't be idle.

In order to curb the expansion of the Liaonan Prefecture in Liaodong, the Khitan side began to support the Liaodong Goguryeo people to attack the Liaonan Prefecture.

At the beginning of the spring of the fifteenth year of Qianning, the Goguryeo people in eastern Liaodong did not know why they united and concentrated tens of thousands of troops to attack Anshi Prefecture, the governor of southern Liaoning.

Li Wenzhong initially thought that the Bohai State was making small moves behind his back, but it was only after he discovered the Khitan cavalry in the battle that he realized the seriousness of the matter.

The Khitan's meddling in the Tang Dynasty's military operations in Liaodong was undoubtedly bad news, and Li Wenzhong immediately sent someone to report the matter to the imperial court.