In these years, fighting a war does not mean that it will start immediately, and it will take time to mobilize troops and logistics.

During this time, Cao Ze was not idle, and locked himself in the study to write and draw.

During this period, Cao Ze asked Cheng Yanjin to call Li Shimin to discuss twice, and Li Shimin was stunned after listening.

"National Teacher, are you sure you want to do this?"

"To save time."

Time flickered, and a month passed.

Lantian County, Li Mansion.

Tomorrow is the day of departure.

Cao Ze came to say goodbye to Li Xiuning.

Li Xiuning didn't say much, just told him to be safe.

At the time of separation, Li Xiuning suddenly grabbed Cao Ze.

She gently helped Cao Ze tidy up his clothes, and then reached out to comb a strand of Cao Ze's hair that had fallen down.

"I ...... Waiting for you to come back. ”

Li Xiuning's hand caressed Cao Ze's face and said softly.

"Don't worry." Cao Ze grabbed Li Xiuning's hand and nodded fiercely: "I'll be back soon!" ”

The next morning.

Ten miles outside Chang'an City.

The troops in Chang'an City and the surrounding military camps were all assembled, and Li Shimin changed into full armor and began the swearing-in meeting.

In addition to the civil and military officials, those princes and princesses have arrived.

During this period, some people tried to persuade Li Shimin to give up the idea of driving in person again, but unfortunately it was useless.

A few of them were too drastic, and they were immediately forked home......

"Clever." Li Shimin said to Li Chengqian: "During my absence, you should take charge of the country. ”

"Son's Command!" Li Chengqian hurriedly replied.

Then Li Shimin gave Empress Changsun a look.

Empress Eldest Sun nodded secretly.

After so many years of husband and wife, she naturally knows what Li Shimin means.

It's nothing more than helping to look at the point, what stupid thing did Li Chengqian of the province.

Although Empress Changsun never took the initiative to get involved in political affairs, in fact, Li Shimin had many things and ideas that were discussed with her in private.

It can be said that Li Shimin can have today's achievements, and Empress Changsun accounts for a lot of credit.

In fact, it should be explained, and the period before departure has been repeatedly explained.

After a few more simple words, Li Shimin turned over and got on his horse and set off with the army.

This time, Li Shimin planned to have the troops from various places set off from their garrisons in various places first, and then converge halfway.

A month and a half later.

Youzhou.

50,000 troops descended on the city.

Li Tai took the things off the car with people and began to assemble the trebuchet.

They've been trying to improve it ever since.

Now, not only has the range and power been increased, but it has also been changed to an assembled type.

In this way, it will save a lot of trouble when transporting, and it can save a lot of unnecessary trouble.

When encountering a really difficult road section, you can even let the army carry the parts over!

Youzhou's side had already received the news that the Tang army was coming, and the whole army was on alert at this time.

The walls were lined with a large number of stones and rolling logs, and the pots were filled with piping hot oil.

Once the Tang army tries to go up the city wall, these things will ruthlessly end their lives!

Needless to say, these defenders of the city are all Turks.

"Go tell the General." A Turkic man commanded his younger brother beside him: "The Tang army has arrived. ”

The little brother didn't dare to slack off, and immediately ran down.

All the Turks on the city walls tightened their weapons and prepared for the great battle!

Although the total number of people in their city is only about 10,000, it seems far inferior to the 50,000 army on the side of the Tang Dynasty.

But these so-called armies actually have a lot of water.

Take Datang's 50,000 army as an example, of which at least more than 30,000 are auxiliary soldiers.

There are only more than 10,000 people who can really pull out to fight.

In addition, his side is defending the city, so he already occupies a favorable location.

If you want to attack the city in these years, it is nonsense if you don't have more than three or five times the strength of the defender.

Now there are more than 10,000 people in the Tang army, I'm afraid they can't even besiege the city!

Not to mention defending the city, he felt that even if he rushed out and fought with the Tang army on the spot, the Turkic side would be nothing short at all!

After all, there were not many cavalry on the Tang army's side at all.

And on his Turkic side, he happens to be good at cavalry!

Thinking of this, this Turkic couldn't help but say with disdain in his heart: Tang Jun is in the water of his brain, and this person dares to come and die?!

Just looking at it for a while, he realized that something was wrong.

These Don armies do not seem to have the intention of attacking the city at all.

What kind of ladders, siege crashes and things like that, I haven't shown up until now.

Without these things, does Tang Jun plan to fly up?

Moreover, the archers of the Tang Army did not have the slightest intention of bending their bows and arrows.

What about the arrows that are said to be covered?

Why is the behavior of this Tang army different from what those two said?

The only thing that made him feel a bit of a siege was the trebuchets assembled in front of the army.

At first, he really didn't see what they were.

I saw that Tang Jun had made a bunch of messy things to assemble and tinker with.

It was only after the trebuchet had gradually taken shape that he had a rough idea.

But he didn't pay much attention to it.

With only five trebuchets, what waves can be stirred?

After they took Youzhou City, those two immediately arranged for people to strengthen the city wall.

In order to deal with the trebuchet of the Tang Dynasty!

The city wall on my side has been specially reinforced, and the thickness is almost twice as thick as before!

Five trebuchets?

Even if they are allowed to toss for a day, I am afraid that they will want to break the city wall!

And on his own side, it is impossible to let them toss for so long.

If nothing else, the general should arrange for people to send troops from other city gates to encircle the Tang army!

Tang Jun is also stupid, he didn't prepare at all at the other three city gates!

In fact, he was not wrong in that idea.

If it was before, it was really the same as he thought.

Only this time, there is a little difference......

Soon, the trebuchet was assembled.

A special oversized bomb was placed and the fuse was ignited.

The length of the lead wire was repeatedly tested by Li Tai before.

Just when the bomb flies to the farthest distance, it just explodes!

In fact, according to the past practice, Tang Jun's side will go through the process first and call a formation or something.

Cao Ze decisively rejected this idea!

Just push it flat and it's over, and be polite to the enemy!

If you have anything to say, wait until the enemy becomes a prisoner!

"Whoosh——!

With the sound of whirring wind, the bomb flew towards the city wall of Youzhou!

It was only then that the Turkic soldiers in the city realized that something was wrong.

Why doesn't this trebuchet look like a stone?

Why is it that the above seems to be on fire?

These two questions have also become the last puzzle in their lives......

"Boom ——!"

"Boom ——!"

"Boom ——!"

The bomb fell on the city wall and exploded in an instant!

The power of a bomb with a diameter of nearly two feet is absolutely devastating in this era of cold weapons!

The Turks at the center of the explosion were torn apart on the spot!

The shrapnel that bounced out also harvested a large number of Turkic lives!

The city wall that was hit immediately had a big hole!

Where have the Turks seen such a formation?

Those who survived by luck were immediately scared silly!

Some were stunned, staring at the dogs.

Some were so frightened that they collapsed on the ground, muttering something in their mouths.

Others even simply turned around and ran down the city wall!

Among them, there were a few people who were astonishingly bold, and after a short period of astonishment, they immediately gave orders.

It's a pity that it's useless.

At this moment, almost everyone was temporarily deaf by the sound of the explosion, and even if they shouted in their throats, no one else could hear half a word.

Before they could come up with a new solution, the second round of bombs arrived!

"Boom ——!"

"Boom ——!"

"Boom ——!"

……