The fall of Cao Bin's troops wiped out the hope in Cao Cao's heart, and after realizing that the supply had been cut off unknowingly, Cao Cao finally gave up holding on and gave the order to withdraw his troops. And the direction in which Cao Cao wanted to retreat was the place where he became famous - Guandu.

Guandu is located in the north of Xuchang, south of the Yellow River, only two hundred miles away from Xuchang, it can be said that it has been very close to Cao Cao's Xuchang lair, Cao Cao set the next stop in Guandu, not only to facilitate the transportation of supplies, but also to occupy a strategic point, annex the south bank of the Yellow River, and resist Ao Lie's elite soldiers of the Northern Han Dynasty with the danger of the Yellow River. At the same time, Guandu is the place where Cao Cao became famous, the battlefield he is most familiar with, and his blessed land, he wants to use the good luck that Guandu once brought to him, and once again repel strong enemies. Fighting in Guandu, not only Cao Cao, but also every Wei army soldier had the effect of inspiring morale, so Cao Cao did not hesitate to withdraw his troops to Guandu, and contracted his troops in Guandu, arranged fortifications, and established a solid defensive line.

The members of the Shadow passed the news of Cao Cao's withdrawal to Ao Lie in the first time. After Ao Lie got the news, he smiled at Zhuge Liang, and then firmly and confidently gave the order to march: "Order the three armies to rise up immediately and approach Guandu!" A certain and Cao Mengde will hunt on both sides of the Yellow River! ”

Ao Lie gave an order, and 800,000 elite soldiers of the Northern Han Dynasty scrambled to obey! The soldiers of the Northern Han Dynasty approached the north bank of the Yellow River in one day and one night, and set up a large camp ten miles away from the shore, facing the Wei army camp across the river. After the state of confrontation was formed again, neither Ao Lie nor Cao Cao took the lead in attacking, and the two sides fell silent again.

It's just that this silence didn't last long.

On September 22, the second year of Kangqian in the Northern Han Dynasty, the southern army led by Pang Tong broke through Runan County in Yuzhou, and the troops approached the hinterland of Yuzhou, burning the fire of war in the south to the Central Plains. Runan County is broken. The Central Plains was shaken, and many people began to flee northward, trying to avoid the troops of the Southern Army of the Northern Han Dynasty, and as these people fled, fear spread like a plague to the north, causing panic among the residents of the Central Plains.

However, the northward march of the Southern Army of the Northern Han Dynasty was only a prelude to a full-scale war. On September 23, the second year of Kangqian in the Northern Han Dynasty, Chenliu County, the westernmost county in the Central Plains, was also lost. Xu Shu, the commander of the Southwest Army of the Northern Han Dynasty, led his troops to occupy Chenliu, dispersed all the Wei soldiers guarding Chenliu, and firmly hammered a nail into the west of the Central Plains.

Two days later, Sun Ce, who returned to the East China Sea, also made a big move, he and Xiao Ru, who returned from Fusang to help the war, one after another, Xiao Ru led 50,000 naval troops to attract the attention of Kaizangba, and then Sun Ce led 30,000 elite soldiers to forcibly land, captured Donglai County in Qingzhou, and planted the banner of the Northern Han Dynasty on the boundary of Qingzhou. Donglai County is the closest county in Qingzhou to the East China Sea. The loss of Qingzhou was equivalent to the loss of the route to the sea to deliver supplies, and Zang Ba had no choice but to go south along the coast and return to land from Xuzhou. Rushed to Guandu and Cao Cao to join the division. Zang Ba's retreat completely ceded the sea dominance of the East China Sea, and Sun Ce completely controlled the East China Sea and became a veritable maritime hegemon.

Reports of defeat in the east, west and south directions are frequent. finally made Cao Cao unable to sit still. Most of Wei's troops were transferred to Guandu by Cao Cao, and were pinned down here by the 800,000 elite soldiers of the Northern Han Dynasty led by Ao Lie, and the defense in other places was relatively weak. If the other three legions of the Northern Han Dynasty were allowed to invade on a large scale, then the Wei State would die out sooner or later, and it was better to give it a go than to sit and wait for death. On the day of October 1 of the second year of Kangqian in the Northern Han Dynasty, Cao Cao finally led his army out of the nest and set up the three armies on the south bank of the Yellow River, intending to fight to the death with Ao Lie!

In the face of Cao Cao's trapped beast battle, Ao Lie did not disappoint Cao Cao, he personally commanded his army to set up a position on the north bank of the Yellow River, stretching from east to west for more than ten miles, and Cao Cao formed a situation of attack with amazing momentum.

On the Yellow River, water warfare is naturally the priority. In the sound of the general's drums, the Jinfan Heavenly General and the Naval Governor Gan Ning straddled on the largest and strongest warship in the world today, breaking the waves from the water village on the shore! According to the model provided by Ao Lie, it took three years to make this battleship, and the whole battleship is five zhang high and divided into four floors, three of which are above the armor and one below the deck. The entire hull is made of ironwood, which is extremely resistant to water and is as strong as ordinary iron, which not only helps the warship to sail faster on the water, but also greatly enhances the hull's ability to resist attacks.

Beyond the hull and on the deck of the battleship, twenty-four huge and heavy logs stood around the sides of the ship's side and the ends of the bow and stern, twelve of which were fixed to the hull to restrain them, and the other twelve were slightly tilted, and the twenty logs were connected by ropes made of ox tendons, so that a discerning eye could see at a glance that once the tilted logs had lost their restraints, they would fall from the sky and slam violently against the water. These logs, which are also made of iron wood, are the sharp weapons of water warfare that Ao Lie quoted from later generations-the slap stick.

Twenty-four red-coated ballistas were arranged in clockwise order on the deck, maintaining an excitation angle on all sides of the battleship, no matter where the enemy's warship appeared, the battleship where Gan Ning was located could strike it in all directions. As long as you enter the range of the red-coated ballista, you will be hit by the red-coated ballista's fierce fire! And if the enemy was not penetrated by luck in the strong fire of the red-clothed ballista, and came to the range of five zhang of this battleship, then what was waiting for them would be the slap stick that fell from a high altitude, in this world, except for some particularly strong warships in the Northern Han Navy, no naval warship could withstand the slap of the batter, which Ao Lie was very sure of.

If it is said that the equipment of the batter and the red-coated ballista has made the battleship under Gan Ning's feet a sharp weapon of water warfare, then there is another design that makes the opponent fearful on the three-story building ship on the deck. Different from ordinary building ships, there is a flat platform on the building ship of this battleship, and the platform is surrounded by wet cowhide and rattan armor, and the wet cowhide is shrouded in the outside of the rattan armor, which together forms a solid defense, which not only ensures toughness, but also reduces the burden on the entire battleship in terms of weight. In the middle of this layer of defense, a hundred archers can be accommodated to hide in it, and with the help of the defense of wet cowhide and rattan armor, they can unscrupulously cast cold arrows around. If this platform is placed on land, it will be an offensive and defensive arrow tower.

This battleship is both in terms of craftsmanship and humanization; Whether in terms of sailing speed, or from its own sturdiness, it can be called the most perfect and advanced warship in the world today, in front of this battleship, those large warships in the Wei army, known as "building ships", were directly compared, and the gap was almost the same as that of aircraft carriers and wooden fishing boats. However, there are only two such warships in the entire Northern Han Dynasty, the one where Gan Ning is located is called the "Qilin Battleship", which is Gan Ning's command ship, and the other is Ao Lie's "Overlord Battleship", which is quietly moored in the water village at the moment, waiting for Ao Lie's call.

After Gan Ning's Qilin warship, a three-story building ship that can carry more than 300 people at the same time sailed out of the Han army's water village, and Su Fei, the deputy governor of the navy, stood on the lookout of the building ship, and the two-color flag in his hand kept waving, passing on the orders one by one.

With the change of Su Fei's flag, the gate of the Han army's water village was wide open, and three giant building ships broke through the waves, and Tai Shici, one of the five tiger generals, stood in the center of a building boat, holding a tiger courage brocade tooth gun, looking majestic and murderous. Around these three ships, there are also fifty warships, each of which carries a hundred elites of the Qilin Navy, and after they sailed out of the water village, they immediately increased their speed and formed a circular battle circle around the Qilin warship in Ganning, together with the four giant ships of Tai Shici and others. Immediately afterwards, hundreds of clippers that could only carry 30 people quickly sailed out of the water village, interspersed in the gap between the battle circle formed by the warships, and complemented the warships.

When the 10,000 Qilin Naval Army took various types of warships and set up a formation on the water surface of the Yellow River, Gan Ning, who was standing on the Qilin Battleship in the center of the battle circle, waved the Optimus Twin Halberds in his hand and let out a roar that made the water of the Yellow River flow backwards: "The Qilin Naval Army is unparalleled in the world!" ”

The 10,000 Qilin elites on various warships immediately waved the seven-foot-long horse chopping knife in their hands and shouted in unison: "The courage of the Qilin, I am invincible!" The unicorn water army, unparalleled in the world——! ”

On the opposite side of the Qilin Navy was a warship team of 20,000 Wei Navy troops, and their commander was Zang Ba, who had been defeated from the East China Sea. Although Zang Ba suffered defeat in the contest with Sun Ce, but looking at the entire Wei army camp, no one can be more qualified than him for the position of the governor of the navy, after all, Zang Ba has lived in Qingzhou for a long time, and he is still very familiar with water warfare. Therefore, Cao Cao handed over the entire naval army to Zang Ba, hoping that Zang Ba could take advantage of being good at water warfare and win the jackpot in the decisive battle with the Han army.

However, Zang Ba, who met the Qilin Navy for the first time, was extremely frightened because of the super fighting spirit burst out of the Qilin elites. Restricted by the topography of the Central Plains, most of the people in the Wei army's navy, to put it bluntly, are just infantry troops standing on warships, and only the tens of thousands of sailors that Zang Ba brought back from Qingzhou can really play the role of water warfare. (To be continued......)