Since Gao Cheng learned that the king of Goguryeo had died of illness, he never thought about the so-called ceremonial funeral, but was determined to take advantage of the suspicion of the Goguryeo lord Shaoguo and the internal contradictions to completely calm the great trouble in the northeast.

According to Gao Cheng's words when he was young, it is: I am a barbarian and do not know etiquette.

For most of the year, he devoted almost all the strength of the whole country to transferring grain and grass to Yingzhou and Qingzhou to supply the war.

Gao Cheng had no intention of sending troops by sea, but he would also use the sea, after all, when the army penetrated deep into the border of Goguryeo, it was indeed difficult to transport grain and grass from the rear.

Hundreds of thousands of horses trampling through will inevitably make the road conditions in Liaozedi even worse and difficult to pass.

Due to the difficulty of the road, after the food and grass on the front line are exhausted, the follow-up supplies cannot keep up in time, which is the biggest danger of this battle.

Cui Che gave up the sea attack because once the troop carrier capsized in the sea, it would be an incalculable loss.

But he was able to accept the loss of the grain ship, but he was only prepared for the sea by sea.

If Duan Shao can seize Liaodong City as soon as possible, use Liaodong City as a forward base, and transfer as many materials from Yingzhou to Liaodong City as possible, and be able to supply this big war, he will not be able to use the means of shipping.

Of course, when it really needs to be transported by sea, Cui Che will also arrange for the sailor to send a big ship from Qingzhou to escort along the way.

The Goguryeo people also had water masters.

With the Xiqun clan as the internal response, Gao Cheng, including Duan Shao on the front line, was already well aware of the situation in Goguryeo today.

After all, King Xiao Gao never fights unprepared.

When Duan Shao led the army to the west bank of the Liao River, he looked back and saw that the Liao Zedi behind him had been trampled by passing people and animals.

The people are still persevering in transporting grain to the front line through Liaoze.

Everyone knows that as long as it rains, there is no need to expect the military rations of Yingzhou to be sent to the front in a short time.

The mobilization of hundreds of thousands of horses naturally could not hide from the spies of the Goguryeo people, and they also had their own countermeasures, which was to pound ice in the Liao River.

Break through the ice so that the Qi army can easily cross the Liao River.

But the Goguryeo people clearly underestimated the power that a unified Central Plains dynasty could explode.

In just one day, Duan Shao erected five pontoon bridges over the Liao River.

He had inspected the front line several times before, and naturally noticed that Goguryeo had destroyed the ice surface of the Liao River, and Duan Shao had already prepared to erect a pontoon bridge.

The general Liu Feng was ordered to lead the vanguard to cross the river, and Liu Feng took the lead and inspired his soldiers to defeat the Goguryeo defenders on the east bank.

With the follow-up troops, Liu Feng defended the pontoon bridge, and that night, the army crossed the Liao River one after another and camped on the east bank.

Early the next morning, the army pulled out the camp and marched towards Liaodong City.

It is to implement Cui Che's pre-war plan and seize Liaodong City as a forward base.

Liaodong City was also called Xiangping City in the Han Dynasty, and it was also Liaoyang in later generations, and after being occupied by Goguryeo, it was renamed Liaodong City, which was the core city of Liaodong, and the western adults of Goguryeo personally sat here.

Goguryeo had four divisions, eastern, southern, western, and northern, as well as five central forces, and after the Han River valley was seized by the combined forces of Baekje and Silla, the southern and central forces suffered heavy losses.

In the eastern and northern regions, the Qi envoys, with the help of the Xiqun clan, instigated the rebellion of the local Yan and other ethnic groups, making it impossible for the eastern and northern divisions to support Liaodong, leaving only the western adults alone to face the menacing Duan Shao.

On the first day of the siege, Duan Shao ordered all his troops to push all kinds of equipment and launched a tragic siege battle.

On the issue of Liaodong City, time was above all else, and he did not have time to use the means of besieging the city to force the defenders in the city to surrender.

Among the 250,000 troops of the Eastern Expedition, Gao Cheng dispatched 150,000 state and county soldiers to Duan Shao, and what they did was to attack the ants.

After more than ten days of siege, after paying a lot of casualties, the Qi army finally gained a firm foothold on the city wall and broke the city in one fell swoop.