Yuangai Suwen now faces a dilemma, he can still draw about 100,000 troops at his disposal, because he has to keep 50,000 to 80,000 troops in the capital of Pyongyang.

This is all his current limit troops, there are more than 20 large and small cities in Goguryeo on the front line of Liaodong, and the total garrison force also has 100,000 elite troops and 50,000 auxiliary soldiers, of which there are 20,000 elites and thousands of auxiliary soldiers in Liaodong City.

And now he doesn't know the situation, he doesn't know how to support, if all the troops are gathered to pass, then it will definitely be okay, but the question is, if the support troops pass, then what to do near Pyongyang?

He didn't forget that less than 400 miles from the south side of Pyongyang, there were also at least 30,000 elites from Datang, and Datang must have increased its troops in Silla.

This is just what they observed in the scouts on the Silla frontline, what if Datang increased the elite on the Silla front line not only 30,000? What if it's 50,000, 80,000?

This means that once their 50,000 elites on the Silla front line are breached, Datang will have the opportunity to drive directly and go straight to the capital Pyongyang!

If you don't support, the situation will be even worse, the whole army of the Tang Dynasty is dispatched, and now only 20,000 cavalry have blocked all their ways out, which means that he doesn't know anything about the front line, in this case, if there is not enough support, the Liaodong front line is destined to be broken through.

At that time, the Tang army arrived at the Datong River (later Yalu River, Sui was called Hunshui before, Sui called it Datong River, Datang changed its name to Yalu River, but some people in Goguryeo still called it Datong River), and the entire Goguryeo was completely finished.

Because of the first line of the Datong River, Goguryeo is not like the first line of Liaodong, there are so many important towns to defend, and there is only one black bone city stationed in an important place on the first line of the Datong River.

But the Black Bone City could not hold the entire Datong River at all, and even the Tang Dynasty only needed to surround the Black Bone City, and then the other troops could cross the Datong River and enter the hinterland of Goguryeo!

Therefore, the Liaodong defense line cannot be lost!

"General Yuan! Black Bone City Urgent! With the arrival of a herald, Yuangai Suwen instantly became nervous, and took the latest information directly from the herald's hand.

When Yuan Gai Suwen opened it, his brows instantly furrowed.

"General Qi Yuyuan, the Tang army seems to have made a big move recently, the Tang cavalry that was originally active near Liaodong frequently appeared near the Black Bone City, and the number is constantly increasing, today it has been detected that thousands of cavalry have appeared near the Black Bone City, and now I request to go out of the city to pursue, please give the general an order."

After reading the latest information, Yuangai Suwen's brows furrowed, the Black Bone City is the top priority of the hinterland of Goguryeo, and it is absolutely impossible to have a problem, but the Tang Dynasty cavalry, which has been mainly harassing before, appeared near the Black Bone City, and it was assembled.

Does this mean that Datang has any conspiracy?

Or is there something wrong with the Liaodong line?

But no matter which one it is, Yuangai Suwen felt that he couldn't wait anymore, there were only 10,000 cavalry, 10,000 infantry, and 5,000 auxiliaries in Wugu City, and if there was an accident with this number, the entire Goguryeo would be completely destroyed.

"Pass my orders." Yuangai Suwen directly called the herald, "Now order General Hudar to lead 20,000 cavalry and 30,000 infantry, quickly rush to Wugu City, and after meeting the army of Wugu City, combine with 10,000 cavalry in Wugu City, a total of 30,000 cavalry and 30,000 infantry, and quickly support Liaodong City." ”

"If the Tang cavalry harasses, drive away, and go straight to Liaodong City, don't hesitate."

"Yes!"

As soon as Yuangai Suwen's order was issued, the entire army near Pyongyang City quickly moved and headed straight for the Black Bone City.

The reason why Qi Bi He Li and others began to gather troops was naturally not because of anything else, but because the follow-up troops of Datang began to advance to the front line of Black Bone City, and their original task of blocking all reconnaissance naturally ended.

Behind him is the 200,000 army of the Tang Dynasty, and Qi Bi He Li doesn't have to worry about it at all, so of course he has to gather troops.

During this time, because the enemy basically did not make much action, even the scouts sent out non-stop were much less, after all, a scout required a team of five to ten people.

During this period of time, more than 500 people have been arrested on the side of the scout Qibi He Li alone.

They don't have much to expend on them.

Now he is going to find a chance to see if this black bone city can take advantage of something, this time Qi Qi He Li can be regarded as almost the reconnaissance of the black bone city, this city is indeed not easy to attack, it is backed by the mountains on one side, and the Yalu River on the other side, only two sides can attack, and the terrain on both sides is not so easy.

The mountain on the side of the mountain is steep, and the mountain is not easy to climb.

However, this is also for other siege cities, and for Datang, there is no bad direction to attack. Even Qi Bi He Li thought of a way to attack.

From the upper reaches of the Yalu River, take advantage of the night to directly put the city-breaking thunder on the wooden shelf, and then go downstream, there is also a river leading from the Yalu River into the city under the wall of the river side of the Black Bone City, as long as the city-breaking thunder enters the city wall along the drinking water river of the Black Bone City, and then detonates.

The entire city wall of the Black Bone City will inevitably collapse in a large area, although because the city wall is close to the river bank, even if the city wall collapses, it will not be able to use the collapsed place to attack.

But the collapse of the city wall could have blocked the entire drinking river.

The drinking water river is blocked, and there is no water source, isn't it a matter of minutes for the Black Bone City to surrender? Of course, there are probably wells in the city, but whether the wells can support tens of thousands of people is also a question.

After all, since there is a drinking water river entering the city, even if there is a well, it is only for convenience, and the number will definitely not be too much.

But it doesn't matter, it's a big deal to blow up the front wall directly.

During this time, the most thing he did was to investigate all the surrounding terrain, according to Li Shiji's order, when the time came, they would directly surround the Black Bone City, and the downstream Tang boats could directly use the boat to cross the river when they arrived.

However, there is still some time before the arrival of the army, anyway, the army is not in a hurry now, the entire Goguryeo line is a coastline, and the supply of the Tang Dynasty is quite simple.

Moreover, in the entire Liaodong front, 100,000 soldiers were captured, and these Goguryeo soldiers could also directly transport follow-up grain and grass, which was quite simple.

As for the question of whether these captives will rebel, Qi Bi He Li has not considered it, since General Li Shiji's side dares to use them, it proves that these prisoners are not a big problem, and it must be that General Li Shiji's side must have received some guarantees.

These are not the issues that he, the forward general, needs to think about.

Qi Bi He Li's guess was right, in fact, the reason why Li Shiji was not afraid of these captives rebelling was also very simple, which had a lot to do with the governance of Datang in the past 20 days.