In the Battle of Hulaoguan in the Tang and Song Dynasties, Li Shimin led 3,500 Xuanjia sergeants against hundreds of thousands of Xia Jun, which proved the powerful strength of Xuanjia Army. Xuan, which means black, also means heavy armor. The Xuanjia Army led by Li Shimin is a heavy cavalry, also known as one of the top ten cavalry in the history of China.

XuanJiaJun by Li Shimin personally training, at any time to add fresh blood, keep a fixed number. After all, their task on the battlefield is very heavy. Even the best, there are many casualties, so we should choose the best soldiers from the army and join in time.

"Zi Tong Zhi Jian" records: "King Shimin of Qin selected more than a thousand elite riders, all of whom were dressed in armor and divided into left and right teams, so that Qin, Zhao and Zhai could divide their forces. In every battle, the relatives of Shimin, led by Xuanjia, took the opportunity to attack and destroy everything, and the enemy was terrified. Qu Tutong, the imperial envoy, and Dou Gui, the emperor Zan, camped by the line, but suddenly they met the king and the battle was unfavorable. Qin Shimin was rescued by Xuanjia and Shi Chong was defeated. He was captured by his rider Ge Zhangyan, and captured more than 6,000 people. Shi Chong fled home. "

As can be seen from this passage, every time Li Shimin fights, it is led by Xuangujun. Although he was planted by the king once, he won. With only 1 0,000 Xuanjia troops, more than 6,000 people were killed in Wang, which was a great shock to the Tang Dynasty.

Xuanjia Army made great contributions to the Tang Dynasty. After Li Shimin succeeded to the throne, XuanJiaJun served as a security guard, and the rest followed Li Jing to fight against the Turks, which was still on the real battlefield. But leitian was not allowed to leave the capital, and gradually lost his edge. Although the long river of history has never stopped flowing, the prestige of the Xuanjia Army is immortal.