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Since the destruction of the Eastern Turks, the Tang Dynasty has never had the move of raising the strength of the whole country to destroy a country. None of the surrounding countries is worthy of Datang doing this. But Goguryeo, without dispute, has this qualification. Even the Manchu Dynasty, which had been planning for many years, was about to send troops today, and did not have great confidence that it would succeed.

In fact, at least one-third of the officials in the DPRK and China were opposed to or had a negative attitude towards the use of troops against Goguryeo at this time.

Jing, called Gaoqiu; view, que type also. Zhan Jie's corpse, building a view of Beijing, thinking that the place where the corpse is hidden, is actually showing off martial arts. Emperor Yang of the Sui Dynasty conquered Goguryeo in the east, but all three times ended in failure, not only lost troops and generals, but also the people in the northeast of the Sui Dynasty, and were plundered by Goguryeo up to 100,000. As a witness to these events, Li Shimin had a great impact on him.

When Li Shimin was young, he was upright in the heyday of the Sui Dynasty. At that time, no one in the Sui Dynasty had any objections. As a hereditary nobleman and a relative of the emperor, the Li family was once a die-hard supporter of the Great Sui royal family, and Li Shimin was also educated as a courtier of the Great Sui Dynasty and was loyal to the emperor of the Sui Dynasty.

The Sui Dynasty will decline in just over ten years, which is inseparable from the Eastern Expedition to Goguryeo. It can be said that if Emperor Yang Guang of the Sui Dynasty did not go east to Goguryeo, the Sui Dynasty would definitely not perish. This is also the reason why as soon as Li Shimin mentioned that he was going to go east, the civil and military forces of the Manchu Dynasty advised him. A simple reason, the Sui Dynasty, which was so powerful back then, failed to conquer Goguryeo, and now the Tang Dynasty, which is in ruins, how can it defeat Goguryeo?

This is just the idea of ordinary people, but Li Shimin's idea is different.

In Li Shimin's consciousness, the conquest of Goguryeo was not as difficult as he imagined. The reason why the Sui Dynasty failed to conquer was directly related to the great joy and arrogance of Emperor Yang of Sui. He doesn't need to have a high level of military talent, but as long as he can fight normally, he won't turn a war that he can't lose into what it looks like later.

The dispute between the Sui Dynasty and Goguryeo has a long history, as early as the time of Emperor Wen of Sui, Goguryeo took advantage of Emperor Wen of Sui to unify the north and south, and repeatedly attacked the northeastern frontier of the Sui Dynasty on a small scale. After King Yingyang of Goguryeo succeeded to the throne, the envoy of the Sui Dynasty met Goguryeo's envoy in the Turks, and Emperor Wen of Sui sent a letter to Goguryeo asking Goguryeo to terminate the alliance with the Turks, and asking Goguryeo to stop the continuous invasion of the Sui frontier and submit to the Sui. Although the king of Goguryeo Oyoyang ostensibly accepted the ultimatum of Sui Gaozu, the following year, the king of Nuyang and Su Mo attacked the Sui Dynasty's hussar palace in Jizhou Road.

In the eighteenth year of the emperor's reign, Gao Yuan, the king of Goguryeo's Yingyang, "led more than 10,000 people to ride Kou Liaoxi" and was repelled by the Sui Dynasty. Goguryeo did not surrender, still did not obey orders, and did not pay tribute.

Emperor Wen of Sui couldn't bear it, and took Yang Liang, the king of Han, and Wang Shiji as the marshals of the march, led 300,000 land and water to attack Goguryeo, and took Shangshu's left servant Gao Gong as the long history of the Han king, and Zhou Luohu as the head of the navy. However, the expedition did not go well, Yang Liang suffered heavy rains, transportation failed, the army lacked food, and suffered from disease. Zhou Luohu sailed from Donglae to Pyongyang City, but was caught in a wind on the way, and many ships were lost. The Sui army had to return by land and water, and eight or nine out of ten died.

When the king of Goguryeo saw the great momentum of the Sui army, he was worried about the second expedition, so he apologized and called himself "Liaodong Dung Tuchen Yuan". Emperor Wen of Sui saw that he couldn't help him, so he had no choice but to quit the army, and he endured it.

But when Emperor Yang of the Sui Dynasty arrived, King Yingyang of Goguryeo carried the Sui Dynasty behind his back and sent envoys to secretly communicate with the Turks, wanting to attack the Sui Dynasty on both sides. At that time, it was the northern tour of Emperor Yang of Sui and stopped at the Turkic Qimin Khan, who did not dare to hide it and told Emperor Yang of Sui about it.

Emperor Yang of Sui was very angry and asked the envoys of Goguryeo to come to the audience and let him do the courtesy of his ministers, and if he made a pilgrimage on time, he would not be blamed for the past and would be treated equally with the Khan of Qimin. However, King Yingyang of Goguryeo insisted on "not obeying" Emperor Yang of Sui's will, and Emperor Yang of Sui began to make up his mind that he must conquer this neighboring country with a heart of disobedience.

In the sixth year of the Great Cause, the Sui Dynasty pacified the Khitan, Tuyuhun and other neighboring countries, and the momentum reached its peak. The neighboring countries, with the exception of Goguryeo, all expressed their submission. Goguryeo became the only thorn in the eye and a thorn in the flesh, and became the biggest stain on Emperor Yang of Sui's martial arts. The conquest of Goguryeo was already on the verge and had to be sent.

Pei Ju, the squire of the Yellow Gate, figured out the thoughts of Emperor Yang of Sui, and persuaded Emperor Yang of Sui to coerce the King of Goguryeo to enter the court on the grounds that Goguryeo was originally a land sealed by Jizi and now did not obey the courtesy. Goguryeo's infant Yang King Gao Yuan really did not follow the rituals and gave Emperor Yang of Sui an excuse to conquer Goguryeo. The following year, Emperor Yang of the Sui Dynasty officially issued an edict to conquer Goguryeo and mobilize the whole country, wanting to fight a war to achieve complete success.

It was this idea that ruined the good situation of the Sui Dynasty. Emperor Yang of the Sui Dynasty ordered Yuan Hongsi, the governor of Youzhou, to build 300 ships to Donglai Haikou, and the specified date was very tight, and the officials supervised the shipbuilders to work in the water day and night in order to complete the task, and hardly dared to rest. As a result of being immersed in water for a long time, maggots grew from the waist down, and countless people died. Emperor Yang of the Sui Dynasty issued an edict to gather the soldiers and horses of the world, regardless of the north and south, far and near, to converge in Zhuo County. Not to mention the loss of labor and money, a large number of soldiers and horses were assembled, the chaotic soldiers were not effectively controlled, and the surrounding people were full of complaints.

After assembling the world's troops, Emperor Yang of Sui requisitioned another 10,000 sailors, 30,000 crossbowmen, and 30,000 Lingnan platoon trowels south of Jianghuai, and ordered Henan, Huainan, and Jiangnan to build 50,000 chariots to Gaoyang to load clothes and armor curtains, and also requisition and send people to supply military supplies. In the autumn of the seventh year of the great cause, Emperor Yang of the Sui Dynasty levied and sent the people south of the Jianghuai River and the ships to transport Liyang and Luokou Zhucang rice to Zhuo County, the ships were more than 1,000 miles, carrying soldiers and armor and the tools of capture, there were hundreds of thousands of people who came and went on the road for a long time, crowded the road, day and night, the dead pillowed each other, and the road was filthy. Before the war started, Emperor Yang of Sui had already stirred up the world to complain.

In this battle, the Sui army mobilized a total of more than one million main battle soldiers and horses, which can be called the largest in history. The Tang Dynasty now claims to have a million soldiers, but in fact, it is not enough for this amount. But Emperor Yang of the Sui Dynasty, even though he complained, he really mobilized so many people. In addition to the people who transported grain and grass for the army, more than 5 million people indirectly participated in the war.

How many people were there in Goguryeo? Five million people participated in the war, and even if one person spat at the mouth, they could drown the people of Goguryeo. In Li Shimin's view, this is a war that cannot be lost no matter how it is fought, and even if it is a dog to command, the battle can be won. This is true, but unfortunately, Emperor Yang of Sui also thinks so.

Since you can't lose no matter how you fight, why can't you reflect the magnanimity of my king's army and the heavenly kingdom? As a result, a battle of national fortune became a 'hype' of Emperor Yang of Sui's brilliant martial arts.

Emperor Yang of Sui decided to drive the expedition in person!

When Emperor Yang of the Sui Dynasty decided to conquer in person, the Manchu civil and military forces did not object. They also felt that although Emperor Yang of Sui had tossed a little bit in this battle, and the people had some complaints, a big victory was enough to fill up these complaints. The emperor wants to show off his martial arts, just let him show it. So inside and outside the government, there was a lot of flattery. Emperor Yang of Sui listened to these words, and became more and more 'riotous'.

He divided the army of more than one million into three routes, the left and right routes, and in addition to the middle army, the left and right armies were divided into twelve routes, and the formation was opened. In order to 'divide the battle merits equally', Emperor Yang of Sui assigned tasks to each road, and planned to eventually meet in Pyongyang after completing their respective tasks.

Before he fought, he finished the battle exploits, how could he be undefeated with such a light enemy? At the end of March of the eighth year of the Great Cause, the army of the Sui Dynasty arrived at the Liao River. Emperor Yang of Sui ordered Yu Wenkai to build a pontoon bridge, and after the pontoon bridge was completed, the Sui army attacked from the west bank. When the pontoon bridge was extended to a position a few meters away from the opposite bank, Goguryeo took the opportunity to attack, and the Sui army could not land on the shore, and many people died. So the Sui army gathered troops, and the Shaofu supervisor He Chou took the bridge, and the armies advanced one after another, fighting in Dong'an, defeating the Goguryeo army, and killing tens of thousands of people.

Although the battle was defeated, it did not hurt the muscles and bones, and the Sui army took advantage of the victory to surround Liaodong City.

The most lethal thing is the pre-distribution of battle merits. Since both the civil and military forces of the Manchu Dynasty and the emperor believed that the battle would be won, from the very beginning, the tone was set for this battle, and Emperor Yang of Sui gave a high-sounding reason, calling it "hanging the people and cutting down crimes, not for fame". Since it is not for fame, then it cannot be grabbed. In order to prevent the generals from covering the attack with light troops and fighting alone to gain merit and fame, any military advance must first hear from Emperor Yang of the Sui Dynasty and wait for the reply order. This directly led to the defeat of the siege of the city, and the Goguryeo army in Liaodong City made several unfavorable attacks, so it turned to hold. Emperor Yang of the Sui Dynasty ordered the siege of the city, and ordered the generals to have the bearing of the upper kingdom, and if Goguryeo wanted to surrender, it should be appeased and accepted, and no more troops should be attacked.

This brain-dead operation made up for the last jigsaw puzzle of defeat. When the city of Liaodong was about to be captured, the Goguryeo army in the city claimed to surrender, and the generals of the Sui Dynasty did not dare to continue the attack according to the order of Emperor Yang of Sui. This situation has been repeated many times, and Emperor Yang of Sui still does not wake up. Even if Emperor Yang of Sui woke up and personally commanded the front line, the Sui army, whose morale had declined, was stalemate for another month under the stubborn resistance of the defenders in Liaodong and failed to take it. The other cities of Goguryeo suffered similar experiences to Liaodong Fortress, but they were not able to take it.

The Chinese army is still like this, and the attacks of other roads are just as bad.

The water route was led by the general of the right Yiwei at that time, Lai Hu'er, and the warships were connected for hundreds of miles, and the momentum was huge. Enter the Hunshui and meet the Goguryeo army and easily break through. Laihu'er wanted to take advantage of the victory to attack the city of Goguryeo, but the deputy governor Zhou Fa was worried about the enemy's rash advance, and still hoped to wait for the other Sui troops to arrive and advance together. Lai Hu'er didn't listen, selected 40,000 elite soldiers, entered the city of Goguryeo, Goguryeo was defeated, Lai Hu'er was in the middle of the plan, Goguryeo ambush soldiers took the opportunity to attack the Sui army, Lai Hu'er was defeated, and the 40,000 soldiers returned only a few thousand.

The Goguryeo army pursued to the Sui army shipyard, and Zhou Fashang lined up to wait for it, and the Goguryeo army retreated. Laihu'er led the army back to be stationed in Haipu, but failed to complete the set task.

On the land side, brain-dead actions also abounded, and at that time, the army carried grain and grass for 100 days, as well as platoon armor, guns, clothing, military equipment, and fire curtains, which were too heavy to bear. The equipment was too big to be discarded, and the soldiers all dug pits under the curtain to bury the grain and grass, but only half the way was gone, and the grain and grass were almost exhausted. At this time, Goguryeo sent its minister Eulji Wendeok to deceive the surrender and observe the reality of the Sui army.

General Zhongwen wanted to take the opportunity to capture Yizhi Wende, but was stopped by Liu Shilong. After Yu Zhongwen let go of Ezhi Wende, he regretted it again and decided to pursue Ezhi Wende. At that time, Emperor Yang of Sui ordered the garrison to be subject to the Zhongwen Festival. Nine armies, including Yu Zhongwen and Yu Wenshu, crossed the water to chase Yizhi Wende. Yizhi Wende saw that the soldiers of the Sui army were hungry, so he wanted to make them more tired, and he was defeated and withdrawn every time he engaged. Yuwenshu won seven battles in one day, continued his advance, and crossed the Sasui. Eulzhi Wende once again sent an envoy to deceive him. Yu Wenshu saw that the Sui soldiers were tired and could no longer fight, and the city of Pyongyang was dangerous, so it was estimated that it would be difficult to take it quickly, so he had to retreat.

When the army returned, the Goguryeo army attacked from all sides, and Yu Wenshu and others fought and marched. When they arrived at Sashui and the Sui army crossed the river halfway through, Goguryeo attacked the rear army of the Sui army, and Xin Shixiong, the general of the Sui Dynasty's Zuotun Guard, was killed in battle, and the Sui army on all roads was defeated and could not be stopped. The soldiers fled for a day and a night to reach the Yalu water, and traveled 450 miles. Wang Rengong was the queen of the palace and repelled the pursuing soldiers of Goguryeo. When crossing the Liao River, there were 300,000 military horses on this road, and when they returned to Liaodong City, there were less than 3,000 people left, and tens of thousands of materials and weapons and ordnance were also lost, all of which became the trophies of Goguryeo. These materials also contributed greatly to Goguryeo's response to the second expedition.

Failed to achieve the expected victory, and the domestic contradictions had no outlets, and finally broke out. Wang Bo, Dou Ziying, Dou Jiande and other common people and peasants revolted and swarmed, innumerable, and captured the city. Emperor Yang of the Sui Dynasty ordered Duwei and Yingyang to hunt down with the county and kill each other, but the peasant uprising could still not be prevented. But after all, the emaciated camel was bigger than the horse, and the peasant revolt was like a pebble thrown into a calm lake, which in the end did not make much of a storm.

After a year's rest after the setback of the Eastern Crusade, Emperor Yang of Sui decided on a second Eastern Crusade. This crusade learned the lessons of the previous time and allowed the generals to "do it cheaply". The Sui army set up flying towers, crashes, and ladders under the city of Liaodong, and dug tunnels to cooperate, and continued to attack the city day and night, but because of the last Eastern Expedition, Goguryeo got a large number of equipment from the Sui army, so that the two sides were evenly matched and fought hard.

Emperor Yang of Sui launched a ruthless attack and decided to fight