Mu Qiyuan asked Liu Feiyu to liberate the Han slaves, stationed in Chayu, received the follow-up supply team, and led the 19th Army through Motuo to command Gongbu (now Nyingchi).

The scattered Tibetans seen along the way were all killed by the Ming army, but the 19th army did not see any castles.

Pioneer Liu Zhenyu is very strange, Tibetans are different from nomads, they have entered the agricultural era, how can there be no castles?

He didn't know that Uszang, as a theocratic local government, had just experienced a series of turmoil and wars, but these wars had nothing to do with the Han people, but a reshuffle of the complex religious schools and local political power in Uszang.

Since Buddhism was introduced to Us-Tibet, it has had a great influence on the Tibetans, and almost all Tibetans believe in religion, but the sects are different.

There are four main schools of Tibetan Buddhism in the land of Us-Tibet:

1. The Nyingma sect, commonly known as the Red Sect.

The Nyingma sect was the earliest, reaching its peak in the early years of the Northern Song Dynasty, and then gradually declined, and during the Chongzhen period of the Ming Dynasty, only the Mingjizha Monastery located at the foot of the north bank of the Yarlung Zangbo River in Gongga County barely maintained the Nyingma sect, and had no influence on the local sects and regimes of Wusizang.

2. Sakya sect, commonly known as flower religion.

Founded by the Kun family in the Northern Song Dynasty, the kings of the Sakya sect are also members of the Kun family, and have always been near Shigatse as their main sphere of influence, with temples almost all over Uszang and Duogan, and the ancestral temple is the Sakya temple in Sakya City, located in the southwest of Shigatse.

During the reign of Chengzu of the Ming Dynasty, he once conferred the title of "Mahayana King" on the high monk Gunga Tashi, whose status was second only to the "Great Treasure King" of the White Sect; He also gave another high monk, Nankha Xubi Gyaltsen, as the "Auxiliary King", and had a hereditary territory, which shows the great influence of the Flower Sect in Wusizang.

3. The Kagyu sect, commonly known as the White Sect.

There are also many schools within the White Sect, but the doctrine is similar, it is the same origin before it was introduced into Wusizang, so the internal conflict is not large, with the Kubu Temple in the northwest of Lhasa as the ancestral temple, the main sphere of influence is in Lhasa, Gongbu and the Yushu area of Duogan, Yongle three years of the Ming Dynasty (AD 1405), Chengzu gave the master of the Coarse Bu Temple as the "Great Treasure Dharma King", which was the highest status of the Tibetan Dharma King at that time, and there were temples in all Tibetan areas.

The Kagyu school pioneered the reincarnation system of living Buddhas, which shows the transcendent status of the White Sect in Uszang.

Fourth, the Gelug sect, commonly known as the Yellow Sect.

Founded by Tsongkhapa in the 7th year of Yongle in the Ming Dynasty (1409 AD), although the religion was established the latest, it was the most influential, and as soon as the Gelugpa school appeared, it immediately spread throughout the Tibetan area, and quickly became the most important Tibetan in the minds of the Tibetans.

There are six famous monasteries in the Gelug sect, among which there are the three major monasteries in Lhasa and the Tashilhunpo Monastery in Shigatse.

The three major monasteries in Lhasa include Ganden Monastery, Drepung Monastery and Sera Monastery.

Ganden Monastery is located in the northeast of Lhasa City, Zhuodan Woche Mountain, built by Tsongkhapa, the founder of the Gelug school, is the ancestral temple of the Gelug school, the temple presiding officer called "Ganden Tripa", is the only one by the election rather than reincarnation, the status is second only to the Da# Lama and the Panchen Lama.

Drepung Monastery is located in the west of Lhasa City in the Gepei Wuzi Mountain, the most influential Da # Lama of the Gelug sect is practicing here, the temple owner is called "Drepung Chiba", generally by the Da # Lama, the famous Potala Palace is located in Drepung Monastery.

Sera Monastery is located in the northern suburbs of Lhasa City in Sera Wuzi Mountain, the temple owner is called "Sera Chiba", sometimes also by the Da # Lama, Sera Monastery is the base for training warrior monks, into the Central Plains of Buddhism Huang School martial arts masters, most of them from Sera Monastery.

Tashilhunpo Monastery is located in the western suburbs of Shigatse, is the practice place of the Panchen, of course, there is no title of the Panchen at this time, "Panchen" is the Qing Dynasty Shunzhi two years (AD 1645) by Shunzhi to give the title.

However, the status of the head of Tashilhunpo Monastery is extremely high, even higher than that of Ganden Tripa of Gaden Monastery, and every time after the death of the Da # Lama, when looking for a reincarnated spirit child and handling government affairs, he is temporarily in charge, and his status can be seen.

However, because the population of Shigatse is far less than that of Lhasa, and the economic income is not as good as that of the monasteries in Lhasa, the Panchen Lama's status in the Yellow Sect is second to that of the Da# Lama.

It is strange that although each of the four major sects has its own traditional territory, they all have extensive monasteries throughout the Tibetan area, so the monasteries of the Ge school are often mixed together, sowing the seeds of disputes among the various schools.

Wusizang is one of the few theocratic areas in the Ming Dynasty, and its religious disputes are also inextricably linked with local governments.

Starting from the Mengyuan Dynasty, the leader who ruled Wusizang was the Pamuzhu family from Sangri County, Shannan Region, and the leader was given the title of "Great Situ", and after the founding of the Ming Dynasty, Emperor Hongwu was awarded the title of "Orchid King".

Later, the power was inherited by the local Lang family, with Naidong County as the ruling center, and the main activity was in the former Tibetan region, that is, Lhasa.

With the gradual development of the Pamuzhu regime, the local heads gradually established their own spheres of influence, and the positions of these local heads were reduced to a lifelong system, which was later called the hereditary system.

Later, the Ge family, a relative of the Pamuzhu regime, gradually obtained the control of the place, and established a substantive political power centered on Shigatse, which the Tibetans called "Renbuba", and the Ming court also recognized it, in the forty-second year of Jiaqing (1563 AD), Renbuba's retainer Xinxiaba Caidan rebelled, and the Xinshaba family controlled the local government of Wusi Tibet, and the leader was called "Disi Zangba Khan".

In the fortieth year of Wanli of the Ming Dynasty (1613 AD), the successor Phuntsok Namgyal took control of the Ali region, and many small states in this region were occupied, and with the exception of the Guge dynasty, the entire Usizang was basically controlled by the Sinshaba family.

However, the Sinshapa family admired the Kagyu sect (white religion) and was extremely hostile to the Gelug sect (Yellow Sect), and hated the revolutionary reshuffle brought by the Gelug sect to Tibetan Buddhism, so they often threatened the Gelug sect with force.

In the forty-fifth year of Wanli in the Ming Dynasty (1618 AD), Phuntsok Namgyal occupied Sera Monastery and Drepung Monastery by force, slaughtered and drove out the Gelugpa monks in the monastery, destroyed temples and buildings, and then formally established the local government of Us-Tibet centered on Shigatse, becoming another secular Us-Tibetan aristocratic regime after Pamu Drukpa and Rinbupa, Phuntsok Namgyal called himself Zangba Khan.

In the first year of the Great Tomorrow Apocalypse (1621 AD), Tanzhen Wangpo succeeded as Zangba Khan, still hated the Gelug sect, and after the death of Da# Lai IV, Tanzhen Wangpo did not let him reincarnate in an attempt to eliminate Drepung Monastery.

In the third year of Chongzhen of the Ming Dynasty (1630 AD), the Gelug sect tried to recover Sera Monastery and Drepung Monastery with the help of the Mongol and Shuote Ministries, and after fierce armed struggle between the two sides, finally Tenchen Wangpo won, but in order to prevent the enemy from continuing to fight with him according to the castle, he ordered to demolish all the large and small castles in his ruling area, except for the fourteen cities such as Shigatse.

The Xinxiaba family established the local government of Us-Tibet by force, unified Us-Tibet, unified weights and measures, and promoted the economic development of the Us-Tibet region, but the war itself caused the already scarce population of Us-Tibet to be drastically reduced, and by the time Mu Qiyuan marched into Us-Tibet, the entire population of Us-Tibet was less than 500,000 Tibetans.

After the destruction of the city, the population was concentrated in a limited number of fourteen castles, which promoted the exchange and integration between the Tibetans, Mongolians and Han Chinese, but the Han people's industrious, simple, diligent thinking, and good management personality enabled them to quickly accumulate wealth, which was jealous and jealous of the Tibetans and Mongolians, who accounted for the absolute majority of the population, which was also the direct trigger for the riots against the Han people in the Wusizang and Duogan regions#.

However, the destruction of the city also provided convenient conditions for the Ming army to quickly achieve military victories, and if the Tibetans were scattered in various places, in the mountains and rivers densely covered with Wusi Tibet, the Ming army would chase and fight, and it would take a lot of time.

Liu Zhenyu's 55th Division was not marching fast, and the Yarlung Zangbo River and the Yarlung Zangbo Grand Canyon were blocked on the way to the march.

As a pioneer, Liu Zhenyu faced mountains, rivers, and canyons, and he could not bear the heavy responsibility of opening roads and building bridges in the mountains, so he could only widen the marching route as much as possible and find a path through this land.

Fortunately, Wusizang has long entered the agrarian society, the Tibetans built chain bridges on these mountains, rivers, and canyons, about two hundred years ago, there was a monk named Tangdong Jiebu in the White Sect, who was famous for being good at building chain bridges, which was probably equivalent to a bridge designer.

The marching speed was slow, and the army could not be hidden, and Liu Zhenyu had no choice, so he could only order the soldiers to kill all the scattered Tibetans he encountered, and try to block the information of the army's entry into Tibet.

Gongbu City is in the southeast of Wusizang, the north bank of the Yarlung Zangbo River, backed by the Yarlung Zangbo River, the average altitude is only 3,000 meters, not much higher than Yunnan, due to the abundant water source, the altitude is relatively low, it is very suitable for agricultural production, and is called "the Jiangnan of Wusizang".

When Liu Zhenyu arrived at Gongbu City, he was stationed at a distance from the East City Gate. As the front army, he not only assumed the responsibility of opening the way for the rear army, but also had the strength to attack the city, after all, more than 10,000 soldiers all armed with flintlock muskets were by no means a military force to be ignored in the Tibetan area.

According to the results of the interrogation, the main military forces in the Usz-Tibet region are: first, eight elite troops trained by Tanzhen Wangpo himself, each army of about 3,000 people, under the personal command of Tangzhen Wangpo; second, the local armies defending the cities in various places were relatively much weaker in combat effectiveness; The third is the army of the Mongol and Shute divisions, the number of which is unknown.

The Mongols are also civilians and soldiers, and they can arm their strong men at any time, and their combat effectiveness is no less than that of the regular army, but they have just lost to Dan Zhen Wangbo, and their combat effectiveness will not be strong there, after all, this is not a steppe that can gallop on horseback, and the mountains and rivers divide Uszangche into countless small pieces, and the Mongolian cavalry cannot give full play to the speed advantage at all.

Liu Zhenyu originally planned to wait for Mu Qiyuan's army to arrive before starting to attack the city, after all, his soldiers were small, only more than 10,000 soldiers, and it was difficult to complete the strategic goal of besieging the city, but the Tibetan soldiers of Gongbu did not give him a chance to wait.