Time came to Zhenguan ten years in the blink of an eye, and Li Yuanjing's newly built ship had been launched for trial voyage half a month ago.

The effect is very good, except for the power, there are no special highlights, and the rest can achieve satisfactory results.

And at this time, everyone was also relieved, at least the ship didn't sink, didn't it?

However, the good news is not without that, the steam engine workshop has also made some progress in the research of steam engines in the past year, and the efficiency of steam utilization has been improved compared with before.

So next, they will modify the steam engine on this ship to improve the utilization rate of steam, so as to increase the power of this ship.

And in the ninth year of Zhenguan, a lot of things actually happened to the imperial court.

The most important thing is the first battle after the military reform, the battle of Tang Zheng Tuyuhun.

Li Shimin had already prepared for this, and Tuyuhun was indeed constantly doing things in secret, so Li Shimin waved his hand and mobilized 150,000 troops to the west to conquer Tuyuhun.

Since the reform of the army has been completed, the materials have been prepared more than a year in advance, and the official road from Luozhou to Chang'an has been fully completed, which has also increased the speed of internal troop transfer.

In just one month, Datang gathered 200,000 troops on the border, of which 150,000 were responsible for attacking and 50,000 were responsible for garrisoning.

Historically, the generals of this battle should have been Li Jing's, but due to the instigation of butterfly wings, Li Jing was in a state of retirement as early as the eighth year of Zhenguan, and rarely had contact with the outside world except for occasional appearances in the navy for exercises.

And Li Shimin also knew that Li Jing's worries were not unfounded, and he himself didn't dare to use Li Jing anymore.

Therefore, Cheng Zhijie, the general of the left leading army and the governor of the former prefecture of the inspection school, was appointed as the general of Zhengtuguhun.

Li Shimin's move scared Cheng Zhijie a lot, but since the appointment came down, Cheng Zhijie couldn't refuse, so he had to go to the front line and start leading the army to fight.

It is worth mentioning that this is the first time in the history of Cheng Zhijie to lead a single battle.

In the past, this was something that Cheng Zhijie tried to avoid, as an old fox, he knew very well what it would mean once he had this experience?

Li Jing is a living example!

Therefore, then Cheng Zhijie played a one-handed operation, in June of the ninth year of Zhenguan, Cheng Zhijie led 150,000 troops to attack in three ways, and in just one month, Tugu was defeated and unable to form an army, and fled one after another, and there was little limelight for a while.

After the military reform, the combat effectiveness of the Tang Army was also completely displayed, and the number of casualties in the troops was reduced by half compared with the imperial court's expectations, and what surprised the imperial court even more was the morale of the troops, especially the will to fight.

They didn't need any encouragement at all, and one by one they were like babies waiting to be fed, as if the enemy in front of them was their food, and the scramble wanted to go.

In fact, it is not difficult to understand that after the military reform, if a soldier wants to be promoted, he can only rely on merit.

Can't go far if you can't read?

If it doesn't exist, after being promoted to the head of the team, the army will organize literacy classes and give you the opportunity to learn to read and write, and after passing this level, the rest will not be a problem.

Each promotion will have a corresponding training course, so theoretically, even if you are an ordinary soldier, it is possible to rise to a high position.

As for the reason, of course, it is very simple, the one who occupies most of the officer positions in the army was the son of the family gate lord before.

With the gradual progress of overseas kings, these people have gradually left the army, and they are going to serve in their own family fiefdoms, so there are more vacant positions.

How many upstarts are there? The upstarts don't dare to be as unscrupulous as the family, so this gives this gang a chance to rise.

The war is naturally happy at this point, and then Cheng Zhijie only needs to command the troops to pursue the victory.

Anyway, Tuyuhun's main force has been almost wiped out, as long as they always keep their sanity, they are not afraid of what the other party will do.

However, at this time, Cheng Zhijie played a riotous operation, he felt that the other party would not give up so easily, and it was not a matter to chase it like this, and it was a waste of energy.

So, while Cheng Zhijie ordered the other two armies to move closer to him, he sent scouts to the front to reconnoiter the enemy's situation.

Ten days passed, and the 150,000-strong army advanced slowly, but the scouts did not see a single hair of the enemy.

It turns out that Cheng Zhijie has missed the best fighter.

Although this battle eliminated part of the enemy's main force, it did not achieve the strategic goal set in the early days of the Tang Dynasty.

The most important thing for a general should be to have the ability to adapt to changes, if Cheng Zhijie can calm down at this time, continue to advance with this unhurried attitude, on the one hand, let the people behind build the city and gradually devour.

Although it has been a long time, if Datang can expand its territory by hundreds of miles every year, it will be a very terrifying thing in ten years.

But Cheng Zhijie is not ......

Finding that his previous prediction was wrong, after delaying for ten days, Cheng Zhijie directly ordered the whole army to attack.

At this time, the enemy has long run away without a trace, chasing a ghost?

But below the general order, even though the generals under his command are Li Shimin's henchmen, although their status is not better than some people, they are not much lower than Cheng Zhijie.

During this time, everyone was also very dissatisfied with Cheng Zhijie's operation, but there was no way, they were generals, so they had to listen to others, so chase it......

Then the army quickly pursued Kushan, where the remnants of Tuyuhun were discovered.

In fact, at this time, the Tang army had already penetrated deep behind enemy lines, and there were not many reserves of materials or anything, although they were tired, they still had a great advantage over Tuyuhun.

The generals suggested attacking immediately, and judging from previous experience, Tuyuhun could not withstand a single charge of the Tang army.

However, Cheng Zhijie ordered the troops to set up camp and wait for an attack early tomorrow morning on the grounds that the Tang army was too tired to rush for several days, and that the enemy army was too tired to attack immediately.

And then......

The next morning......

What they saw was an empty enemy camp, they didn't even pack up supplies, and overnight, tens of thousands of enemies quietly disappeared, leaving only traces of one place.

And at this time, Cheng Zhijie decided not to chase ......

After Cheng Zhijie's continuous commotion was transmitted back to Chang'an, Li Shimin scolded angrily.

It is not difficult to deal with a Tuyuhun , and this time it can also be seen as an opportunity specially given to him by Li Shimin, but he didn't expect Cheng Zhijie to make mistakes one after another and delay the fighter several times.

In the end, Li Shimin ordered Cheng Zhijie to revoke the position of the governor of Xikaidao, immediately returned to Chang'an to report on his work, appointed Ren Chengwang, and Li Daozong took over the position of the governor of Xikaidao.

Cheng Zhijie left with a sad face, but he was finally relieved in his heart.

After Li Daozong took over, he immediately sent scouts to strangle the Tuyuhun scouts scattered around, and at the same time determined the location of the other party, and directly ordered 50,000 troops to raid Tuyuhun, killing tens of thousands of Tuyuhun in a battle, and capturing Fuyun, the king of Tuyuhun.

There was not a long time between the front and the back, but they were two completely different results.