The 100,000 people in the military city have adapted for a year, and Li De does not plan to rush to send troops, he must understand the situation in northern Liaobei and prevent the sneak attack of the Goryeo.

Then there is that he is very busy now, and the application of Zhuge ballista has made him see hope, fighting a war must be a strong ship and a good artillery, and the location of the military city is very special and it is a strong defensive place, so it must be guaranteed to be foolproof.

So Li De was not idle, and the elites of Yanyun cavalry and Bingcheng were practicing with the chariot tactics to give full play to the chariot's greatest role.

The chariots and cavalry were repeatedly rehearsing, and Li De was watching from the side, and there was a tactical plan given by Li Jing and others on the table in front of him.

"Li Jing, Zhuge Ballista has been applied, what do you think are still lacking?" Li De asked.

"The chariot exerts the power of crossbow arrows in close combat, which can effectively pierce armor, and the disadvantage is probably that the arrows are too small to cause insufficient lethality." Li Jing said.

Li De actually didn't say that in ancient times, some strange things would be smeared on hidden weapons in the rivers and lakes, and it was not difficult to cause lethality.

It's just that this kind of thing is not easy to say openly.

"Lethality, what you said reminded me, the bearings on the ballista should be longer now, and if you lose the ability of the ballista, you can also use it as a crash, and you should hit a few long rams on the carriage."

Li De proposed a new plan, but Lu Mingyue next to him didn't think so.

Lu Mingyue followed Li De to the military city to test the practical application effect of the new tank, and after yesterday's battle, many people have some understanding of the performance of the tank.

As a craftsman and builder of chariots, Lu Mingyue naturally knew more about chariots.

"Grand Duke, the load-bearing capacity of the ballista has reached its limit, and if the wooden cone in the collision is installed, the speed of the chariot will be reduced, affecting the maneuver."

Li De nodded, it is better to let professional people handle professional work, he just wants to give full play to the multi-functional use of the chariot, but not all chariots can have multi-functional capabilities.

Thinking that in terms of current technology, being able to invent the Zhuge Ballista is already a very cross-era thing, Li Jing said that the lethality is not enough, in fact, he also decided that this is the case, thinking that it would be good if it could be like those equipment in later generations with the ability to kill in a range of areas.

After seeing the Spitfire on the scene, it was really like seeing a big killer.

"Area damage, how about the Sky Piercing Monkey?"

Li De suddenly thought of the fireworks and artillery battles he had played when he was a child, and the development of firearms after the Ming Dynasty was still very advanced, but he did not give full play to his leading edge.

"That's right, isn't the Sky Piercing Monkey a big killer of area damage."

Lu Mingyue saw that the Metropolitan Governor was muttering, but he couldn't understand it, but it didn't affect him, and he had already guessed that it seemed that the Metropolitan Governor had come up with something new.

In fact, the biggest hole card of the vanguard is black powder, which has been used in several key battles as early as the top secret of the vanguard, and now it is mentioned that gunpowder is further applied.

Li De's idea is very simple, it is actually good to use it to make some smoke to confuse the public, it is really an application like a monkey, it is okay to play in the end, and there is still a danger in the real application, after all, many things in technology do not meet the requirements.

However, this does not affect the use of gunpowder as a secondary piece of equipment.

The rocket car he just came up with has been denied by him, one is a matter of distance, and the other is that the damage range and power cannot achieve the desired effect.

It's better to settle for the next best thing and make some smoke grenades to use, which can be used with weapons that attack indiscriminately, such as the Spitfire.

The enemy cannot see the location of the Spitfire and cannot see its tricks, and the smoke grenade is not only useful, but also can specify the location.

Coordination tactics will work very well.

Li De, whom Lu Mingyue saw, was smirking on the side, and he didn't dare to ask, so he could only wait for him to come back to his senses.

He Bida personally came to Li De's side after a chariot training, and before he had time to wipe off his sweat, he clenched his fists and asked, "Governor, do we still need to correct our tactics?" ”

Li De was interrupted by He Bida's voice, in fact, he was imagining, and said that he had thought about it for so long and the chariot had finished a lap.

"It's good, let's rest." Li Dedao.

He Bida took people to rest, and the soldiers couldn't leave the main generals, and they had to get together to discuss tactics, which was the habit of the middle and high-ranking generals in the vanguard.

It's all in response to what Li De said, if there is only one problem, then there will be countless answers to the problem, and all the captains and lieutenants have implemented the meaning of this sentence, and there are enough plans to prepare at any time.

Li De, who was sitting on the side, encouraged them to do this, he didn't participate for fear that those generals would be nervous, he still had a lot of ideas, now that there are chariots to assist in combat, then is it a plan to carry out air battles.

Suddenly, an inspiration made his idea start to run wild, since there is a Zhuge God crossbow, then the wooden ox and flowing horse can also be realized.

Legend has it that the wooden ox and the horse are very powerful, and he has also seen someone restore this magical means of transporting goods, which is actually a wheelbarrow with a stand, and some people say that it is a four-wheeled vehicle.

Li De thought about the vehicle carefully, and he had already ordered a large number of vehicles in Youzhou Workshop, and suddenly thought of a very powerful thing.

Kong Ming lantern, when he was on the wall of the military city, he had such an idea, although the Kong Ming lantern can be lifted into the air at night, but it is also the same kind of flammable thing, if it is released on the city wall, it will fall after being lit after being evacuated.

If the lantern is filled with oil, it will deal damage to enemies on the ground, which is useful when the weather charm is in their favor.

Can be used to defend cities.

Li De recorded all the whimsical things, whether they were useful or not, they still had to be made and tested before they could be known.

Lu Xingxing knew that these craftsmen were alive again.

Just when Li De was studying all kinds of new items in the military city, Yanmen and Shuofang on the border of Sui State were attacked by Turkic soldiers and horses, especially Yanmen Pass had been lost, and 100,000 Turks were directly fighting through Yanmen to Taiyuan.

Emperor Yang of Sui in Jiangling was furious, how could he not be angry when he had just experienced a defeat and was beaten into the pass by the Turks.

"Lone remembers that he recruited 50,000 elite soldiers, and now only Tang Guogong can send troops to resolve the current crisis." Emperor Yang of Sui said to several confidant ministers.

The faces of several ministers were normal, it was not that they were not worried, but they were in Jiangling, even if the Turks entered the customs, it was estimated that they would not be able to hit Jiangling, so they were not in a hurry.

For Emperor Yang of Sui's words, he just acted according to orders.

Tang Guogong in Taiyuan Mansion had received news that 100,000 Turkic cavalry had entered from Yanmen Pass and drove straight into the direction of Jiangling.