When the king of Nanzhao, Long Shun, was killed, it was suggested that the capital of Nanzhao, Yang Tho Ba, should be slaughtered in retaliation for the torture and killing of the Tang army and civilians when the Nanzhao tribe rebelled many years ago.

After all, the brutality of the army of Nanzhao was thousands of times more powerful than that of Tibet.

The Tibetans captured the county of Datang Prefecture, and as long as the local residents did not resist, they would send officials to appease them.

When the Nanzhao came, they completely sold people into slavery, and only a few high-ranking officials could be appointed by the Nanzhao nobles.

Tubo is doing everything possible to win over the local high-level, and the nobles of Nanzhao have been tortured by Tang officials, so they often dismantle Tang officials. Only those low-level intellectuals can get the credit of the Nanzhao aristocracy.

Tang Zhangwei knew the hatred of the people of the Tang Dynasty and the Six Ministries of Nanzhao, but his ambition was not to win the hearts of these extremists, but to seek the world for the Tang Dynasty.

Tang Zhangwei said: "Now that Nanzhao is already my Tang Dynasty territory, if it is said that the slaughter of their nobles and people, it is certainly a pleasure, but more than 3 million square kilometers of land, who should I send to garrison?" ”

Sure enough, when Tang Zhangwei reprimanded these fools, the festival envoys from all over Nanzhao surrendered one after another.

After Tang Zhangwei obtained more than 3 million square kilometers of land in Nanzhao, he set his sights on Tibet.

At this time, Tibet was already divided, and the last powerful monarch of Tibet, Dharma, ascended the throne in 838 AD.

In view of his brother's excessive trust in the monks, the situation in Tibet was chaotic. Therefore, he strongly forbade Buddhism.

After Dharma's succession to the throne, he embraced Bon and promoted many Zhangzhung nobles from previous dynasties.

He ordered that his subjects should not believe in Buddhism, that Buddhist scriptures be burned, that Buddhist monasteries be closed, and that monks who do not work should be returned to the laity.

This provoked a backlash from some of the great aristocrats who benefited from Buddhism.

In 846 A.D., Lalongbede rode on a white horse blackened with charcoal, dressed in a robe black on the outside and white on the inside, and wore a black hat on his head. Pretending to be a Bon master, he blackened his face with oil and charcoal, hid a bow and arrows in his sleeve, and rode to Lhasa.

Many Buddhist aristocrats secretly showed the way for Lalongbed. At that time, Dama was reading the inscription at the Temple of Princess Wencheng, and he considered making an alliance with the Tang Dynasty and obeying the Tang Dynasty as the kingdom to avoid being attacked by the Tang Dynasty.

Lalongbede walked up to him and recited the Bon Sutra in his mouth.

Out of politeness, Rama bowed back. Lalongbed secretly took out his bow and arrows during the first prayer, drew his bow and arrows in the second prayer, and shot the arrow at Dama in the third prayer, and the arrow hit Dama in the forehead.

Damadon felt the world spinning, and he pulled out the arrow with both hands, but he died bleeding profusely.

Lalongbede fled to Sikang, where he was found.

When Dama died, he only had a posthumous son, and later the nobles held Damma's widow Ou Song and the adopted son of the princess Yundan hostage, and fought for the throne of Tubo Zampu for many years, and the Tubo Dynasty collapsed.

Yun Dan, he was the son of Shang Yanli, the elder brother of the last princess of the Tubo Dynasty. In 842 AD, after Dama was assassinated, the Qi clan supported Yundan as Zampu and became regent himself.

Many ministers were not satisfied, and the posthumous son of the second concubine was Osong. The later Lhasa royal family was a descendant of Yundan, but unfortunately Yundan's minister Shang Re was killed in the conflict of the Tang Dynasty, after which Yundan was killed in the rebellion.

During a slave revolt that swept across the snowy plateau, Yundan's descendants retreated to Lhasa.

The slave society in Tibet completely collapsed, and the Tibetan kingdom perished.

After the collapse of the Tibetan Dynasty, there was a situation of division of many large and small regimes, among which the descendants of the three largest Tubo kings and Yundan occupied Lhasa, called the Lawang line, and their power was in Lhasa, Samye, Duokang and other places.

Nyimagon, the grandson of Ozon, retired to Alibrjang as king, and his three sons ruled Mon respectively.

This Tibetan royal family is known as the Ladakh royal line, and the royal families of Bujang and Zhangxiong - Guge are collectively known as the "Upper Sangon".

Tashi Zoupa, the grandson of Osong, had three sons: Bad, Goude, and Kidd, known as the "Lower Three Virtues". The third son of Hude, Chiqiong, formed the royal line of Yalong Jue'a according to the city of Yalong Qin Ondaze, and the descendants of the second son Chide settled in Qinghai and became the king of Tsongkha.

Tashi Zouba, after receiving support for his next move, moved on to Gugshi, claiming to assist him in his defense.

Faced with the chaotic political situation, Tang Zhangwei decided to send a large army into Tibet.

First of all, Tang Zhangwei sent 100,000 troops into the snowy plateau where Tubo was located in the name of mediating disputes.

At this time, the two major aristocratic groups in Lacheng, the Lu clan and the Ba clan, the two major slave owner families in the Weiru area, had a fierce war because of their interests, and the entire Weiru area was in flames.

In the later stage of the war, the war between the four groups of the Tibetan nobles, Lu Cheng, Ba, Jaan, and Zheng, was peaceful, and the people of Lacheng were miserable.

In order to win over the people and nobles of the plateau, Tang Zhangwei ordered the opening of the Tea and Horse Market, through which paper, silk, and tea from the interior of the Tang Dynasty entered the Tubo Plateau.

Cattle, sheep and horses from the Tibetan Plateau were exchanged to the interior of the Tang Dynasty, and the economic exchanges between the mainland of the Tang Dynasty and the border areas of Tibet were very close.

As a result, the various parts of Tibet were divided into political power and integrated with the economy of the Tang Dynasty.

Tang Zhangwei led 50,000 elite soldiers, crossed many crowdless people and mountain lakes, and reached the vicinity of Lacheng.

At this time, the four aristocratic groups of Lacheng united with the rebel army from Jinluo, Tubo, in a vain attempt to resist the powerful Tang army.

Tang Zhangwei said contemptuously: "Tubo rebels, I led the heavenly army to quell the war, if you are captured, I can also guarantee your lives, if you stubbornly resist the heavenly army, I am afraid that your destruction will fall from the sky." ”

The noble groups in the city, fearing that they would be wiped out by Tang Zhangwei's troops, surrendered to the Tang army one after another. Yun Dan's grandson Lang Keli painted his face red, then tied his neck with a straw rope and surrendered to Tang Zhangwei.

Tang Zhangwei said with satisfaction: "This is the attitude of obedience to Datang!" ”

The four nobles all handed over their children and organized a Tubo iron cavalry for the Tang Dynasty.

Unlike the successful conquest of Lacheng, the other two Tibetan kings, Tashi Zupa and Nimagon, were a little at a loss.

Tashi Zouba, the grandson of Ou Song, had three sons, Bade, Hude, and Kidd, each of whom led his cavalry in a vain attempt to fight against the Tang army.

Nyimagon, the grandson of Ozon, retreated to Alibrjang, and he left Guge with his three sons and wandered the snowy plateau in a vain attempt to hold out against the Tang army.

Nimagon ceded the Guge region to Tashi Zoupa, and ran to the Qinghai region himself, just switching the ruling area with Tashi Zoupa.

Tang Zhangwei and Bai Cunxiao drank butter tea, ate barley noodles and dim sum, and discussed how to deal with the recalcitrant army on the plateau.

The Tibetan princes led the tribe around Tang Zhangwei's big tent and listened to Tang Zhangwei's orders.

Everyone ate blood sausages and roasted the fire, feeling very warm, and at the same time wanted to unify the whole of Tibet as soon as possible and end the hopeless religious war.

Tang Zhangwei said: "Bon and Buddhism have been fighting on this plateau for a hundred years, but neither side has reaped the benefits. ”