Dou Jiande's army confronted the Tang army according to Dongyuan before, Dongyuan is the East Guangwu, and the Guangwu that Li Yin went to when he reconnoitred the enemy's situation is the West Guangwu, and the East and West Guangwu are all on the Guangwu Mountain, about 200 steps apart, separated by a deep stream.

Guangwu Mountain is in today's Guangwu County, its Shandong Lianxingze, the west of the water, even fifty miles, according to the "Historical Records" record, when the Chu and Han Dynasty contended, Xiang Yu and Liu Bang were in the Guangwu garrison, building a city to confront.

Due to the large number of Dou Jiande's troops, people couldn't help but be afraid, which made all the generals of the Tang Army look panicked.

Li Yin took a few cavalrymen to the high hill to look at the enemy's formation, and said to the generals: "The enemy has raised troops from Shandong, and has not yet encountered a strong opponent, but now he is in danger but very noisy, and there is no discipline. If we do not move, their courage will naturally fail, and as long as the soldiers are hungry for a long time, they will inevitably retreat automatically, and if we catch up and attack, we will surely win. I make a promise with you, and I will surely defeat them after noon! ”

Looking at Li Yin, who was full of confidence, the generals' expressions calmed down, although the enemy army was strong, they believed that the invincible King Jin would definitely lead them to win this battle!

At this time, Dou Jiande first sent 300 cavalry to wade through the water, stopped at a distance of one mile from the Tang camp, and sent someone to inform Li Yindao: "If the Tang army has the guts, please select a few hundred elite soldiers to compete with the 300 cavalry of our army." ”

Li Yin sent Pei Xingyan to lead 200 cavalry out of the camp to fight, the two sides clashed with each other, advancing and retreating, it was difficult to distinguish the victory and defeat, just when the two sides were about to return to the camp, Pei Xingyan suddenly turned around and rode alone into the enemy camp, unstoppable, after slashing and killing more than a dozen people, he shot arrows at the cavalry generals of the Dou army.

The cavalry generals of the Dou army fell to the ground in response, Pei Xingyan led people to kill again, and the three hundred cavalry of the Dou army were defeated and returned.

This small battle, although it did not affect the overall situation, but Pei Xingyan's big victory, but it greatly stimulated the morale of the Tang army, and the morale of the Dou army also dropped slightly, the reason why Dou Jiande sent three hundred horsemen to provoke, in fact, he couldn't help but have contempt for Li Yin in his heart, just as Li Yin expected from the generals before.

At this time, Dou Jiande's general Wang Wan rode the Qing Horse, the mount of Emperor Yang Guang of Sui before his death, wearing new shining armor and holding exquisite weapons, far away from the front of the battle to boast to everyone in the Tang army.

Li Yin is a horse lover, and he can't help but sigh: "He rides such a good horse!" ”

After hearing this, Wei Chi Jingde asked for an order: "Since the general has taken a fancy to that horse, let the last general go and snatch the mount of that guy and present it to the general." ”

Li Yin hurriedly shook his head to stop him and said, "How can you let a warrior take an adventure for the sake of a horse?" ”

Wei Chi Jingde didn't listen, and he and his deputy generals Gao Yongsheng, Liang Jianfang and others rode straight into the enemy formation, captured Wang Wan alive, and led his mount back to the Tang camp, and everyone dared not stop it.

Li Yin asked Wei Chi Jingde to recall the herding horses north of the Yellow River, intending to wait for him to return before going into battle.

Taking advantage of this time, Li Yin sent a letter to Dou Jiande: "The Zhao and Wei regions, which have always been owned by my Tang Dynasty, are now being invaded by Dou Gongyou, only because the King of Huai'an was captured and treated with public courtesy, and was sent back to Princess Tong'an, so they treat each other sincerely and give up old grievances. Wang Shichong recently reconciled with the public, but there have been many repetitions, and now Wang Shichong's demise is just around the corner, but he lured the public with clever words, and the public led the people of the three armies to obey the dispatch, and the military expenses of the daughter were consumed for others in vain, which was really not the best policy.

Now that I have met with Dou Gong's outpost, they are vulnerable, so I am a little frustrated by Gong's spirit, I hope you can follow the kind advice and take the initiative to withdraw from the army, if Gong does not listen, I am afraid that you will regret it. ”

After Dou Jiande read it, he immediately burned Li Yin's letter, and smiled at the generals beside him: "Li Yin, the commander of the enemy army, is afraid of the prestige of our army, so he can only play this kind of small trick." After hearing this, the generals all pretended to be relaxed and agreed.

By noon on this day, Dou Jiande's army had been arrayed for nearly three hours, and the soldiers were hungry and tired, so they all sat down, and they were fighting for water, hesitating to retreat, which really fulfilled what Li Yin said before, Dou Jun's discipline was insufficient.

At this time, Li Yin received news from Wei Chi Jingde that he was about to return with the war horses grazing on the Yellow River beach.

So Li Yin ordered Cheng Yanjin to lead 300 cavalry, gallop south through the west of Dou Jiande's army formation, and instructed Cheng Yanjin: "If the enemy does not move, you will lead the troops back, and if it moves, lead the troops eastward." ”

Cheng Biting Jin went to Dou Jiande's formation, the enemy formation really moved, Li Yin clenched his fists and said: "The time for battle has come!" ”

At this time, the war horses on the Yellow River beach had also arrived, so Li Yin ordered the whole army to attack. Li Yin led the light cavalry to set off first, and the army followed, wading east through the water, and directly attacked the enemy's formation.

Dou Jun did not expect that the Tang army in the camp would suddenly attack, when the Tang cavalry suddenly came, Dou Jiande's ministers were making a pilgrimage to Dou Jiande, and after seeing the enemy, the courtiers ran to Dou Jiande, and Dou Jiande was calling the cavalry to resist the Tang army, because the courtiers blocked the cavalry and could not pass.

In the end, Dou Jiande waved his hand to order the courtiers to retreat, but when this advance and retreat, the Tang army had arrived in front of the battle, Dou Jiande was in an embarrassing situation, and retreated close to the eastern slope, and the Tang army general Su Dingfang immediately led his troops to attack Dou Jiande according to Li Yin's instructions to him, and the situation was slightly unfavorable after the battle.

Li Yin led the cavalry to help, invincible, Wei Chi Jingde stepped forward and charged, rushed straight out of the rear of the enemy formation, and returned to rush into the formation, several times in and out, hit several arrows on his body, his courage was still undiminished, and he shot people with arrows, and they all fell to the ground.

During the battle, Pei Xingyan's mount was seriously injured and died, Li Yin gave him his spare war horse and asked him to follow him, so the armies fought, and the battlefield was dusty and covered the sky.

Li Yin led Luo Shixin, Wei Chi Jingde, Huang Junhan, Pei Xingyan and others to roll up the banner, rushed into the enemy formation, came out from behind the formation, opened the Tang army flag, Dou Jiande's soldiers turned around and saw the Tang flag fluttering behind the formation, and quickly collapsed, the Tang army chased out thirty miles, and killed tens of thousands of enemies.

Dou Jiande was also stabbed by the spear of the Tang army in the confusion, and fled to Niukouzhu in the east to escape.

Cheng Yanjin, who had gone out to lure the enemy before, always kept in mind the words entrusted to him by Li Yin: "Dou Jiande is not strict with his own defense, if his army is in chaos, he will have a chance to capture and kill him!" ”

At this time, Cheng Yanjin saw Dou Jiande fleeing in a hurry, so he immediately took three hundred cavalry to chase Dou Jiande, Dou Jiande was already injured, and after seeing Cheng Jianjin who suddenly killed, he was anxious for a while, and desperately patted the horse, so that the wound collapsed, and under the pain, he fell off the horse.

Seeing this, Cheng Yanjin was immediately ecstatic, and soon led the cavalry to Dou Jiande's side and surrounded him.