Before the war, Wang Shichong knew that his strength was weak. In order to preserve the country's territory, he sent four special envoys to Mobei, Hebei, Jiangling and Jianghuai.

Hebei Dou Jiande has always been on discord with Wang Shichong because he looks down on him. In addition, the two sides fought several times for the territory of the Central Plains, so the two sides fought each other. Moreover, Li Yuan had long formed an alliance with Dou Jiande, so Dou Jiande ignored Wang Shichong's envoy at all.

Jiangling Xiao Mill, known as 400,000 soldiers, but most of them were reckless and brave, so they were sent back to their hometowns to farm. Although he treated Wang Shichong's envoy with courtesy, in fact he had no troops to mobilize. In addition, the troubled times relied on the soldiers to defend the territory, and they could only refuse Wang Shichong's request.

Jianghuai Du Fuwei has long been a vassal to Li Yuan and was named King Wu by Li Yuan. In order to show his loyalty, Du Fuwei directly sent 3,000 soldiers to the foot of the mountain for Li Shimin's dispatch and appointment.

Therefore, as soon as the battle started, the only thing Wang Shichong could count on was Luo Khan in Mobei.

Li Yuan had already sent many spies in Mobei to closely monitor the movements of the Turkic soldiers and horses. In addition, he sent Tang Jian as a special envoy to escort a large number of gifts to Mobei, bribing the princes and nobles with a lot of money, hoping that they would not send troops south.

Chu Luo Khan knew that in this Central Plains War, Wang Shichong could not defeat Li Yuan no matter what, and in order to prevent Li Yuan from becoming bigger further, he had to take action.

However, in recent years, the successive failures of foreign troops have made many nobles on the steppe lose confidence in him, so he has been unable to organize a large-scale army to fight south.

The only thing that Chuluo Khan could rely on was his younger brother Jieli.

Jieli is a man of righteousness and wealth, his character is vicious and vicious, he uses soldiers strangely, and is often able to win by surprise, so he enjoys a high prestige in the tribe.

At this moment, he was ordered to come to the Khan's court from the eastern steppe of his fiefdom, in order to help Chuluo Khan use troops to the Central Plains.

Li Yuan knew that at this time, the Turkic forces were not as good as before. But their cavalry moved quickly, and if they were not guarded, they could penetrate thousands of miles into the Central Plains within three to five days.

The northern border of the Tang Dynasty, stretching for thousands of miles, where is it fortified?

At this time, it became extremely important to master the enemy's march routes.

The Turkic soldiers and horses went south, and the two closest routes to Chang'an were Yanmen Road and Yunzhong Road.

Yanmen Road is blocked by the Great Wall, the mountains are thousands of ravines, and the Yanmen Pass is the Xiongguan of the world; Although there is no pass in the Yunzhong Road, the mountain road is rugged, and once the cavalry enters, it is like a dragon entering the shallows, and it cannot be used at all. However, there is also an advantage to this way, that is, it is highly hidden.

The Turkic scouts learned that Yunzhong Road was guarded by Li Daozong, a young general of the Tang Dynasty, while Yanmen Pass was garrisoned by Li Yuan's daughter, Princess Pingyang, and Chai Shao, the commander of the horses.

Chu Luo Khan and Jieli had never heard of the name Li Daozong, and after careful inquiry, they learned that it was Li Tang's clan, and he was not yet twenty years old at this time.

Jieli laughed when he learned about it and said: "Li Yuan transferred all the elite soldiers and strong generals away for the Eastern Expedition, how can he not be defeated here?" Let's watch my Turkic cavalry march rapidly and smash Chang'an! ”

When the Turkic 30,000 cavalry arrived at Yunzhong Road, they found that the main road ahead was blocked by antlers, stones, and thistles.

The Tang army set up ambushes along the road, and attacked the Turkic cavalry with bows, crossbows, rolling logs, and spears along the way.

Most of the cavalry fled desperately, and when they arrived at the Khan Court at the foot of Yin Mountain, they found that nearly half of the men and horses had been lost in this battle.

In fact, Jieli didn't know that although Li Daozong was young, he was not a fledgling, and he was already a battle-filled general.

Since Li Shimin started the army at the age of eighteen, he has taken him with him, and he has been on the battlefield for a long time.

Since then, Jieli has completely remembered the name Li Daozong.