How good is Wang Xuance? Why can he sweep India with only ten thousand troops?

First of all, Wang Xuance was led by Tubo soldiers in the rear. Not just ten thousand horses.

Wang Xuance did not fight all India, but China Tianzhu (a part of India). Zhong Tianzhu is not strong, but he is by no means a small village head. At that time, tens of thousands of troops were sent out to fight Wang Xuance in Zhongtianzhu, which was not a gathering community at all, but a country. Judging from the wealth that Tianzhu attacked the Tang Dynasty at that time and the numerous cities that Wang Xuance breached, Middle Tianzhu and East Tianzhu were definitely countries, not too weak. Just because it was too attractive, it was not noticed by people in the Tang Dynasty at that time. ? Dong Tianzhu took out 30,000 oxen and horses, bows, knives and baoying collaterals and presented them to Wang Xuance. A single Bordet patron can easily give Wang Xuance a treasure pearl, eight boxes of big pearls, an ivory pagoda, a stupa and four Fo Yin. At the same time, give ten paragraphs to ordinary members of the Wang Xuance Mission.

The battle of Tianzhu in Wang Xuance was actually to defeat Zhongtianzhu, not the whole Tianzhu. Before Wang Xuance, Tianzhu was in a state of disintegration and infighting. During the Zhenguan period, Wang Xuance did not go to Tianzhu to contact Tianzhu against Tubo. When Wang Xuance was sent to Tianzhu, it was already after the Battle of Songzhou. Tubo Songzan Gambu has great respect. Tubo Songzan Gambu recognized cowardice, surrendered and paid tribute to the Tang Dynasty, which controlled Tuyuhun, Tangut and Blanchard in Qinghai and suppressed Tubo. No one can see the need to contact Tianzhu to deal with Tubo. And Tianzhu and Tubo are separated by the Himalayas. Under the technical conditions at that time, even the unified Tianzhu could not contain Tubo. Moreover, at that time, Tianzhu was in a weak state of division and infighting, and Tianzhu was simply unable to contain Tubo. Besides, Tianzhu came for help to save himself. But because it angered the rulers of the Tang Dynasty.