Since you're ready to play, let's just play a big one.

The toxicity of oleander is very strong, but to what extent, Cao Liang does not know, after all, he has only heard of its name, not in fact, he has never personally experimented, and he has never seen oleander poison people.

In fact, Cao Liang also knows a little about oleander.

The smoke produced after this kind of thing is burned, whether it has a lethal effect, and how large the coverage is, all of this is actually unknown, and Cao Liang can only carry out it with the attitude of trying it out.

In order to increase his certainty, Cao Liang deliberately ordered people to go to the Wei army camp to take arsenic, croton, sulfur and other highly toxic substances, and mashed oleander branches and leaves to make poisonous smoke bombs, with the smoke of oleander, to form a double guarantee.

Cao Liang was almost busy all night, and it was not until the east was white that all the preparations were completed, and now the Wei army had been delayed for several days under the Golden City, and for the Wei army in a state of lack of food, there was indeed no time to wait any longer.

But everything is ready, what is missing is a wind, only the right wind direction and wind force are suitable for casting poisonous smoke, so Cao Liang secretly prayed to God to help him get through this difficulty.

The degree of dependence on the weather is too great for the release of poisonous smoke to be carried out without the right wind direction and strength, and all efforts are in vain.

The soldiers of the Wei army were apprehensive and were waiting silently.

It was windless all morning, and the banner of the Wei army was wilting and drooping, just like the mood of the soldiers of the Wei army, if there was no wind all day, then the situation would be too bad.

But fortunately, the heavens are beautiful, and at the end of the day and the beginning of the day, the flag in the camp suddenly fluttered, and the direction pointed by the flag head was the inner city of the Golden Wall.

This wind is not only in the right direction, but also the wind is just right, the Wei army can't help but blow in unison, it seems that God is on their side, and there is no endless road.

Cao Liang immediately ordered the ignition.

Wet oleander branches are difficult to ignite, so the Wei army mixed some dry grass and dead branches into the oleander branches, which are very easy to ignite and the fire is extremely vigorous, and after adding wet oleander branches, it will produce thick black smoke, which will drift with the wind to the inner city of Jinjinwei.

The Wei army was in front of the inner city in a flat distance of fifty zhang, every three feet set up a fire, all the fires were lit together, forming an overwhelming smoke, at this time the wind speed is just right, can blow the smoke to the inner city, but not to blow away.

The Wei soldiers kept adding dry wood and wet oleander branches to the fire to ensure that each fire had a constant stream of smoke.

Thick smoke soon enveloped the golden inner city, filling every street and every house, and the sun was no longer visible overhead in the inner city, and the weather seemed to have become gloomy, and it was difficult to distinguish the figure of a person a dozen steps away.

The Wei army did not launch any attack on the inner city this time, but instead piled up a large amount of firewood and grass under the inner city, which couldn't help but make Liu Yin wonder, could it be that the Wei army would repeat the old trick and try to attack the inner city?

Liu Yin is still very confident in the fire prevention of the inner city, when the inner city is built, it pays great attention to the fire prevention function, and the houses in the entire inner city are almost all built with stone bricks and earth, and wood and thatch are rarely used, so the inner city is completely not afraid of fire.

Liu Yin couldn't help but sneer secretly when he saw the Wei army's move of gathering firewood and grass, the loss of the outer city was already his carelessness, and the inner city couldn't let the Wei army's tricks succeed again.

However, after collecting a large amount of firewood and grass, the Wei army did not come to burn the city, but when it was still some distance away from the outside of the city, it was all ignited, emitting billowing smoke and sweeping towards the inner city.

Liu Yin only understood at this time that the Wei army was not going to attack with fire, but with smoke.

In this regard, Liu Yin scoffed, how much attack power can the smoke have, and the Wei army wanted to take advantage of the smoke to launch a sneak attack, right? This little trick is a fart in Liu Yin's eyes, they just take advantage of the direction of the wind to play these tricks, and when the wind becomes stronger or the wind direction changes, this bit of smoke doesn't know where it will blow.

Liu Yin ordered the Shu army to defend the city to the death, in case the Wei army came to sneak attack, and now the smoke is full of sky, it is a good time for the enemy to sneak attack.

One by one, the Shu army climbed on top of the battlements of the city wall, their eyes widened, as if they wanted to distinguish the traces of the Wei army from the thick smoke.

But the Wei army did not wait, many Shu soldiers had symptoms of dizziness, nausea, coughing and vomiting, and some Shu soldiers were already foaming at the mouth and fell to the ground, unconscious.

Liu Yin also inhaled a lot of smoke on the city, only to feel dizzy, he secretly screamed badly, tore off a cloak to cover his mouth and nose, and said loudly: "Be careful, all the troops, this smoke is poisonous!" Get out of town! ”

The soldiers of the Shu army hurriedly covered their mouths and noses, and hurriedly retreated to the city, the smoke on the city was the thickest, and naturally they couldn't stay any longer.

Of course, in this case, the Shu army is not afraid of the Wei army coming to attack the city, the smoke is poisonous, it can poison the Shu army, and it can naturally poison the Wei army.

When you get to the city, it's not necessarily easy, the thick smoke is simply pervasive, and the entire inner city is shrouded in smoke.

At this time, the wind was not too strong, and the Wei army continued to smoke, resulting in the Shu army in the city having no way to dodge and dodge, so they could only find wet cloth towels to cover their mouths and noses and try to minimize the inhalation of toxic smoke.

"Despicable!" Liu Yin secretly scolded, this kind of indiscriminate means are generally disdainful, but Liu Yin also has to admit that on the battlefield, in order to win, it is natural to use unscrupulous means, and the Wei army's use of poisonous smoke to attack the city is indeed unexpected by Liu Yin.

If the Wei army uses normal means to attack the city, Liu Yin is completely sure to deal with it, but at this moment, the Wei army has no routine at all, and the former is precisely because of the fire attack they carried out from the top of their heads, so that the outer city of the Golden Siege was taken, and now they are actually attacking with poisonous smoke and poisonous fog, so that the Shu army is unable to defend against it.

There is no good way to deal with this poisonous smoke Liu Yin, but to endure, try not to breathe in the poisonous smoke as much as possible, and insist on waiting until the wind blows or maybe changes the direction of the wind, and then there is a turnaround.

Liu Yin retreated to the city, thinking that he could escape with only the house, but what he didn't do was that Cao Liang was already holding back his big move outside the city, so that the defenders would not die, and he would never rest.