When Li Yuan had just established the Tang Dynasty, in order to avoid the troops from the east, he took the initiative to give up attacking Luoyang.

But in the rear, he encountered a huge threat from Xue Ju in Jinzhou.

At that time, there were two secessionist regimes in Longyou - Xue Ju in Jinzhou and Li Liang in Liangzhou. Among them, it is Jinzhou Xue who is strong and strong, and his power is strong.

Xue Ju, born in Jincheng, Lanzhou, is burly, brave and powerful, and good at riding and shooting. His family has a huge fortune, and he has always liked to make friends with heroes, so he has a high reputation in the Golden State.

At the end of the Sui Dynasty, when the world was in turmoil, he raised troops to occupy Jincheng and established himself as the overlord of Western Qin.

After Emperor Yang learned the news, he sent Huangfu Juan to lead more than 10,000 troops to suppress it, and Xue Ju only led 2,000 cavalry to meet the enemy.

On the day of the decisive battle, a strong wind fell from the sky, the wind was violent, and the Sui army, which was flying sand and stones, was in chaos, and many people were even killed by flying stones. Because Xue Ju was downwind, he took advantage of the wind to attack with all his strength and defeated an enemy several times his size.

Since then, the first battle has been successful, and the prestige has been great!

Zhong Lishu, the leader of the Qiang tribe in Minshan, led 20,000 people to join him, and Xue Ju was overjoyed.

He also divided his troops to seize the prefectures and counties, and conquered the cities. In just a few months, he got the land on the right side of Longshan and had 130,000 troops.

Due to the very rapid expansion and rapid expansion of power, Xue Ju's ambition was flourishing. He proclaimed himself emperor in Jincheng, with his wife Koji as the queen and his son Xue Rengao as the crown prince, built a mausoleum for his ancestors, and erected the Xue family temple in the south of the city, officially proclaiming the establishment of the Western Qin State.

In the process of Xue Ju's continued eastward expansion, he met Li Shimin, the king of Qin of the Tang Dynasty. Xue Ju's son, Xue Rengao, was defeated by Li Shimin in Fufeng and fled.

Xue Ju was depressed when he saw his defeat, and once wanted to surrender to the Tang Dynasty, but was dissuaded by the strategist Hao Ming. Hao Ying persuaded him to use the power of the Qiang soldiers, unite with the Liang division, bribe the Turks, and make an appointment to jointly attack Chang'an City.

Li Yuan had just established Datang at this time. In May, Li Yuan was proclaimed emperor. In June, Xue Ju's army had already captured the area of Jingzhou and Qizhou.

Li Yuan got the report and immediately ordered Li Shimin, the king of Qin, to be the marshal of the Western Expedition, and to command Liu Wenjing, Yin Kaishan and other eight commanders to resist the enemy.

By July, the two sides faced off at Gaojaw City.

Because of the previous victory, Li Shimin mentally relaxed his vigilance, so that the pre-war preparations were insufficient.

Xue Ju first deliberately lost the battle under Gaoqian City, causing Li Shimin to relax his vigilance. That night, Xue Ju sent his most elite cavalry to attack the Tang camp at night. Since most of the Tang army was still asleep and was not well prepared, he was wrapped in dumplings by Xue Ju.

The Tang army was almost completely annihilated, more than sixty percent of the soldiers were killed or wounded, and all the eight commanders were killed in battle. The corpse of the Tang army was piled up by Xue Ju's order, and it became a mountain of corpses up to Zhangyu.

Since the beginning of the army, Li Shimin encountered such a fiasco for the first time, he looked up to the sky and roared, so helpless, he had to lead the rest of the army to flee back to Chang'an, waiting for the fall.

After Xue Ju's victory, he prepared to take advantage of the victory to drive into the pass and attack Chang'an.

In the face of such a crisis, Li Yuan, as the emperor, was calm and calm. He immediately sent fast horses to the Eastern Turk Shibi Khan, mentioned the covenant that had been about brothers and mutual help, and promised to use Lingzhou as a fortress and cede Yulin, Wuyuan and other meanders as the control areas of the Eastern Turks. And further proposed that if the Tang Dynasty obtained the land of Longyou, it would contribute all the wealth of Longyou.

Li Yuan had only one condition, Shibi Khan could no longer help Xue Ju, and should help the Tang Dynasty.

Shibi Khan was overjoyed when he heard this, and immediately agreed to send troops south to Guanzhong to assist Li Yuan. Soon, Shibi Khan sent a special envoy Yu Sheshe, who led more than 10,000 people to enter the south bank of the Yellow River, and sent troops to fight with the Tang army to conquer Xue Ju.

Xue Ju learned that Shibi Khan suddenly turned around, knowing that it was impossible to conquer Chang'an. He sent envoys to contact Shibi Khan several times, but they were all refused, because Shibi Khan knew that his offer would never be as high as Li Yuan's.

Xue Ju saw that the territory he had just seized was gained and lost, and he knew that the great cause was empty, so he couldn't help but be angry and fell ill and died.

The scales of victory began to tilt in favor of Datang......

Xue Rengao, the new emperor of Western Qin, was suspicious, cruel and tyrannical, and although he was dragged on the battlefield and was known as the "enemy of ten thousand people", he would not win people's hearts at all. At first, a group of old ministers who followed Xue Ju retired one after another, and the internal affairs of Western Qin became increasingly decadent.

War is just an extension of politics, and Li Yuan, who has gained political superiority, is no longer worried about the enemy of Western Qin at this moment. He once again appointed Li Shimin as the marshal of the Western Expedition and led his troops to attack Xue Rengao.

In view of the previous defeat, Li Shimin was very cautious in his use of troops this time. He set up a formation in the shallow water plain, and constantly sent troops to plunder the enemy's grain routes.

After accumulating troops for nearly half a year, he launched a fierce attack when the enemy's food was exhausted, and pacified the Western Qin State with the autumn wind sweeping away the leaves in the first battle.

After that, the Tang Dynasty took over the Shandan Horse Farm, which was once controlled by the Western Qin under the Qilian Mountain, and obtained a large number of war horses. A large number of talents from the Western Qin State entered the Tang Dynasty to serve, adding new strength to the Tang Dynasty.

After Xue Ju's forces were pacified, Li Liang of Liangzhou was persuaded by An Xinggui, a minister of the Tang Dynasty, to join the Tang Dynasty. After Liangzhou was annexed, all the land and population to the right of Longshan were attached to the Tang Dynasty, and the Hexi Corridor was completely opened up by Li Yuan.

From then on, the caravans of the Tang Dynasty could go west to the distant Western Regions, reaching Persia, Egypt, and Rome. Merchants from the Western Regions could also drive camel caravans to the Tang Dynasty, bringing exotic objects, bringing foreign customs, and news of foreign countries on the Silk Road.