As early as when he decided to launch a night attack, Liu Yu had already thought of the inconvenience of marching at night.

Even if it is a flat road like later generations, plus signs, road signs and other signs, you will still get lost at night.

What's more, in ancient times more than 2,000 years ago, not only were there signs and road signs, but even the roads were very simple.

Roads built according to the trend of mountains and rivers will easily confuse the direction and become lost when you move at night.

Therefore, Liu Yucai asked Youlun to select many soldiers familiar with the road from the army to accompany him.

As a cavalry general of the front army, his duty to take the lead naturally fell on Wu Xin's head.

Liu Yu took out a small silver box from his body and handed it to Wu Xin's hand.

"Bocheng, you lead the way forward. I will give you this compass to use. Compare the map to prevent errors from being reported."

Due to the accuracy of manufacturing, this kind of compass is nothing more than nothing, but it is better than losing east, west, south and north in heavy fog.

Then, under the cover of heavy fog, Liu Yu led 4,000 front troops toward Rongcheng in the northwest.

However, it took more than 30 miles of road to arrive after just over an hour.

The road from Yicheng to Rongcheng was maintained and used on the basis of the Qin straight road built in the Qin Dynasty. Because there were deep traces, there was no loss of roads at all.

When the vanguard cavalry said that they were approaching Rongcheng, Liu Yu ordered the entire army to rest on site.

"Your Majesty, there are no sentry outside the city. Even if there are, this foggy day is useless."

Wu Xin had just touched the walls of Rongcheng. Even at such a close distance, the defenders on the top of the city could not find anything at all.

"This city is not big, there are only two gates in the north and south, so it is very easy to block it!"

After listening to these, Liu Yu was already very confident.

The combat effectiveness of Youzhou soldiers in these cities has been severely reduced. Not to mention that they want to compare with these elite Han soldiers, even the previous Youzhou soldiers themselves have been seriously regressing.

Since the military-good general Qi Hong and Wang Feng passed away, Wang Chang, Sun Wei, Wang Zan and others of the Youzhou Army did not have enough command, and most of the soldiers were quickly divided up and became private soldiers of the army leaders, and were regarded as slaves.

"As long as the men strive to be the first, as long as they grab two city gates, they will win."

Liu Yu believed in this.

Along the way, he talked to the guide sent by Youlun and knew that these ordinary Youzhou soldiers were very envious of their colleagues from the Han Dynasty in Qingzhou.

These Youzhou soldiers knew that the soldiers of the Han Dynasty were all called "Military Warriors". They were not only not slaves of generals and officials of all sizes, but also had land ranging from a hundred acres to a thousand acres, and they also did not have to pay taxes and labor service.

Therefore, the news that Liu Yu received from these former Youzhou soldiers made him understand the principle of "a defeated the enemy without fighting".

Liu Yu even thought to himself.

‘I am afraid that after the Han army climbed the city wall and shouted a few times, the Youzhou soldiers guarding the city would surrender.’

Sure enough, the subsequent facts proved that Liu Yu's conjecture was perfectly confirmed.

After the front army approached the city wall, in addition to seizing troops to block the north gate and cavalry parade around, the remaining troops and horses all concentrated their efforts to capture the south gate.

At this time, the city gates were basically made of thick hardwood, and there was no such thing as a small city like Rongcheng.

Therefore, the Han army directly carried a large amount of sulphur as a weapon to burn the city gate.

Because Liu Yu had discovered that the urban defense system of this era was far inferior to that of later generations, there were few city gates covered with copper and iron, and there were basically no culverts and water-filled things.

Instead of spending a lot of effort to dig the ground and dig the city walls, it is better to burn the wooden city gate directly and make it more convenient and quicker.

When the Han soldiers approached Chengcheng Gate and placed sulphur brimstone to burn the city gate, they alarmed the defenders above their heads just a few meters away.

"Who!?"

"Someone!"

A few words in Youzhou accent penetrated the fog and reached the ears of the Han army.

The Han soldiers outside the city did not answer at all. They took advantage of the dim torch light on the city and followed the direction of the sound, and immediately fired a bow.

"Puff puff puff"

"ah!"

"There is an enemy attack!"

A few muffled and screams rang out immediately.

At this moment, a huge yellow and white light suddenly flashed at the city gate.

Under the effects of oxygen supply from potassium nitrate and the explosion of sulfur, the wooden city gate was quickly ignited through.

Under the action of oxygenation and combustion, at a high temperature of nearly a thousand degrees, no wooden city gate can withstand it.

Everything happened in a moment.

The defenders behind the city gate had no time to carry the stones, rolling woods, etc. that blocked the city gate, so they watched a hole burned through the wooden city gate.

Several Han soldiers near the city gate also saw the burned city gate.

"You guys, the first achievement is at this moment!"

After saying this, a leading Han army officer covered his head and face with a wide coat on his body and drilled towards the still burning dilapidated city gate.

The huge fire and the strong smell of gunpowders shocked the nearby defenders. Except for a few brave soldiers who were planning to block the city gate, the other Youzhou soldiers were screaming and running around in fear.

"Closing the city gate!"

"You can't let the thieves come in!"

Several Youzhou soldiers had just shouted and stopped a few soldiers when they suddenly heard the sound of shouting from the burning city gate behind them.

In the horrified eyes of the Youzhou soldiers, several "thieves" wearing armor, holding swords and guns, and wearing smoke on their clothes had already penetrated through the burning city gate and rushed into the city.

In just a blink of an eye, all the Youzhou troops who were trying to transport wood and stone to block the city gate were beheaded on the spot.

These Han troops "firstly" climbed the Han army and immediately roasted them and removed the two huge iron latches behind the city gate.

The two city gates, which were still lit by fire, slowly opened.

Several former Youzhou army guides who were with Liu Yu saw that the thick city gate was burned through for a moment. They all exclaimed that ghosts and gods had arrived in the world, knelt on the ground and kowtowed towards the city gate.

Everyone was muttering endlessly.

"Divine Fire comes to the world!"

"Zhurong Divine Fire!"

Seeing this, Liu Qiao grinned happily.

"In a moment, this city has been down."

Seeing this, Zhao Kun next to him smiled happily.

"Your Majesty, it's so easy to break the city. I think I can defeat Luoyang by giving me ten thousand people!"

Liu Xi had no time to pay attention to him, and waved his hand, and the generals on standby next to him led the soldiers to the city.
Chapter completed!