Zhang Xiaowu did not march to Youzhou until ten days after the formation of the army in Daizhou, at this time the Rakshasa army fought several times with the armies of Shen Lindong and Zu Gongmao in Youzhou, but the Rakshasa people were not in a hurry to fight a decisive battle, but circled with the Qinglong army. The rebels from all over Youzhou reported one after another, and finally blocked the Rakshasa people at the foot of the Cockscomb Mountain, a hundred miles away from Longmen Pass.

After several days of confrontation between the two sides, the main force of the Qinglong Army arrived at Jiguan Mountain.

On the 28th day of the first month of the fourth year of Dade, Zhang Xiaowu personally led the army to attack Jiguan Mountain, the two sides fought hard for three days, and on the second day of the second month of February, the Rakshasa army suddenly fled in the direction of Longmen Pass. Zhang Xiaowu immediately ordered the pursuit, the Rakshasa people arrived at the Longmen Pass and fought with the Dragon Guard, suddenly the killing outside the Longmen Pass was everywhere, and the Beiyi Khan King Pu Xianlie led the army to attack the Longmen Pass in the north and south.

Because the Qinglong Army did not catch up with the Rakshasa army at this time, Longmen Pass was attacked from both sides, and at the same time, the gap in the pass was set on fire, and Longmen Pass was finally broken by Inuyi. The commander of Longwei was extremely sad and angry when he saw the loss of Longmen Pass, and then committed suicide and martyrdom.

When the Qinglong army arrived at Longmen Pass, the Rakshasas had already united with the Beiyi people to occupy Longmen Pass, and Zhang Xiaowu immediately regretted it when he learned that Longmen Pass had been lost because of his army's slow march. He didn't expect that the Beiyi people would go south to attack Longmen Pass, after all, the Beiyi people would inevitably pass through the Black Forest of the Beiyi people when they went south, and the Beiyi people had been fighting against the Beiyi people for two consecutive years. If the Beiyi people go south, they will inevitably put their rear grain roads in front of the Beiyi people, how can the Beiyi people have a better time? But I never expected that when the Beiyi people went south, the Yan people not only did not cut off their food routes, but even kept silent, as if they had reached some kind of tacit understanding with the Beiyi people.

Even when the Inuyi coalition army held the Longmen Pass, Zhang Xiaowu's siege force was attacked by the black arrows of the Indigo, and some of the Indigo people actually joined the camp of their enemies, the Beiyi people.

"Damn Inuyi! Damn Beiyi! Damn rakshasa! Damn the Devils! Zhang Xiaowu pointed to the southern city wall of Longmen Pass and scolded, "And - who the built the southern city wall so high?" Against whom? Guarding against your own people? Bastard! ”

The generals smiled bitterly, this dragon pass is completely different from the two wolf passes, the north and south city walls of the pass are as high as the same as the solid, although the dragon gate pass is not as tall and strong as the two wolf passes, but it is also much stronger than the general city wall. A soldier of the Dragon Guard stood up and explained: "Longmen Pass is different from the Two Wolves Pass, Inuyi can't conquer the Two Wolves Pass head-on, but he can't go around it. In addition to attacking Longguanmen head-on, Inuyi can also climb mountains and mountains, or take a boat to detour into the hinterland of the Central Plains. Therefore, when the Longmen Pass was built, in order to avoid being attacked by the enemy behind the back, this Longmen Pass was built to be as high as the north and south. ”

The Qinglong Army attacked for ten consecutive days, and the Inuyi Coalition Army firmly held the Longmen Pass, and the Qinglong Army could not conquer it for a while, so the two sides could only continue to confront. Later, Zhang Xiaowu tried his best, but the tunnel was dug but failed because of the serious water seepage caused by the proximity to the sea, and the mountain was failed because of the steepness of the mountain range, and the Beiyi people had already prepared.

So Zhang Xiaowu thought of forming a navy to go around the back of Longmen Pass, but found that the shipbuilding technology of the Han army was really too poor to cross the sea to fight. Zhang Xiaowu remembered the boat that stopped in Yuehua Lake, the kind of giant ship that could carry 300 people and rely on the wheel drive. It's a pity that on the day of the change of Li Canglan Palace, the fire burned the palace, and the river boat was also burned down. What's even more odious is that the construction drawings of the river ship only exist in the palace, but the palace fire burned down the library, resulting in the drawings also being burned, and since then the river ship has become a legend.

Since ancient times, attacking and defending the city pass is the most difficult to fight, the same is true of Longmen Pass, Zhang Xiaowu tried his best, but the enemy was well prepared, under the advice of Wu Song, Zhang Xiaowu ordered to camp on the south side of Longmen Pass to confront it.

This confrontation, from February to May, Zhang Xiaowu received a letter of apology from Ayegubach, the king of the Ya Khan, through the Two Wolf Pass.

In his letter, Ayeyabach wrote that at the end of last year, there was an infighting among the Tatars, and that the other seven tribes of the Tatars did not obey the leadership of the Hai Tatars and were preparing to elect another Khan, and a civil war broke out in the Tayas. Before that, because Ayegubach had led his army to resist the attack of the Beiyi, the direct forces of Ayegubach had been seriously damaged, which gave the other seven tribes of the Tatar a chance to rebel.

The reason for the Eight Divisions of the Martial Arts was that their enemy, the King of the Northern Yi Khan, Park Hyun-yeol, changed his previous methods of fighting against the Martial Arts and disintegrated the Eight Divisions from within.

In the past, the Beiyi people used to use and contain the Ya people, and the two sides sometimes cooperated and sometimes fought. Park Hyun-yeol first threatened to attack only the sea elbows, and then secretly bribed the other seven tribes of the sea elders, and spread rumors that the sea elbows would annex the other seven tribes and form an empire with the sea elbows as the master and the other seven as domestic slaves.

The sea elwe is richer than the other seven tribes combined, and the population is the largest, and the people of the sea elbowel often look down on the other tribes on weekdays, and the two sides have long had conflicts. In addition, when the Yakor Khanate was at war with the Beiyi Khanate, the Haiya army suffered the most losses and suffered serious damage to its strength, so the other seven tribes of the Yaka began to have strange thoughts.

At the end of the third year of Daedeok, through the continuous efforts of Park Hyun-yeol, the other seven tribes of the Khan joined forces to hold a meeting to select the Khan King, and the Khan King of the Khan was elected separately, and the Khan King of Ayagubach was deposed.

The Haijingba tribe was furious, Ayeyabah personally led the army to crusade against the rebel tribes, but was ambushed on the road, Ayagubah was wounded by an arrow, and when facing the other seven tribes of the alliance, Ayeyabah promised to abandon the Khan and move the tribe out of the Black Forest, and the Haiyaku lived in Tucheng.

The Seven Divisions of the Yakuza finally drove out the Hipsters, but then the question came, Ayagubach is no longer the king of the Khan, but who will be the new king? Under the instigation of Park Hyun-yeol, the Seven Tribes of the Warriors fought and killed each other in order to compete for the King of Khan, and the entire Black Forest was full of battlefields of the Warriors.

Originally sparsely populated, the civil war left many tribes with only women and children.

Park Hyun-yeol Beiyi then sent a message to the Ya people, saying that the Beiyi people had received assistance from the Rakshasa people and wanted to occupy the warm land of the Central Plains, hoping to borrow the way from the Ya people to go south.

Subsequently, the Beiyi people sent 150,000 troops south to attack Longmen Pass, and occupied Longmen Pass with the Rakshasa people, and confronted the Han Qinglong Army for three months.

During this period, the Beiyi people took advantage of the unpreparedness of the seven tribes of the Heights of the Empire, launched a surprise attack, completely conquered the Sevenfolds of the Black Forest, and adopted the Commanders as slave troops, and sent the Commanders of the Warriors to Longmen Pass to fight the Han army. The once famous Yakhan Khanate in history actually died in this way, which is somewhat surprising and embarrassing, the Yaka became slaves, and the Kwantung region was completely controlled by the Beiyi people, and since then the Han army has a powerful opponent, the Beiyi Empire.