Heavy convective weather leads to heavy rainfall, which is very common in the summer.

Located on the eastern side of Huashan, Tongguan on the banks of the Yellow River and the Wei River is hit by multiple thunderstorms every summer.

Because most of the generals on both sides were devoted to the battlefield, and they didn't even have time to watch the sky, the thunderstorm clouds in summer piled up quickly, and few people noticed when the dark clouds were covering the sky.

Thunderstorms form quickly, but they don't necessarily go quickly. Sometimes the rain stops in a few minutes or ten minutes, but many times it lasts for a long time. No one knows when this overwhelming rain will end.

The rain poured down in the lightning and thunder, and the whole world seemed to be a white curtain of rain.

At this time, the wind has gone down. There was no wind, and although it did not blow the arrows off the way, the heavy rain had a greater effect on the bow and arrow shooting than before, and the strings were soaked and it was more difficult to pull apart than usual. Even if you can pull the string and shoot the arrow, the impact of the crazy rain curtain will remove a lot of the kinetic energy of the arrow, and it will also change its direction, which will still seriously affect the shooting effect.

Moreover, the heavy rain will fascinate people's eyes, and they will not be able to see clearly, and those sharpshooters who specialize in shooting rebel officers will also lose their aim.

Cui Qianyou, who was besieging the city, knew that God had created an opportunity for him, and he was overjoyed to press all his troops up, and under his personal order, several Zhonglang generals led his men and horses, rushed to the forbidden ditch one after another, using the height raised by the corpse, helping each other or using the ladder, climbing the west edge of the forbidden ditch, and then erecting the ladder, and starting to ascend the city.

The arrows of the Tang army were still shot intensively, but because of the influence of the wind and rain, the lethality was several times less than before the beginning of the wind and rain, and even the arrows hit the body, which would not hurt people or only suffer some skin injuries.

Seeing that many ladders were erected under their dense arrow fire, the Tang army on the head of the city began to use rolling stones and sassal wood to defend.

A thick wooden strulate was thrown down from the city under the joint force of several Tang Army sergeants, and happened to smash on a cloud ladder that had just been erected, under the action of huge kinetic energy, several sergeants who had just begun to climb the cloud ladder were hit by the sassal wood and fell down after screaming, one sergeant was stoned to death on the spot, and the other two sergeants were smashed under the forbidden ditch and fell into the pile of corpses.

Fortunately, the pile of corpses had a cushioning effect and did not let them lose their lives, but they were also seriously injured and could no longer be killed.

A stone weighing more than 100 pounds was also thrown from the city, and a ladder was broken on the spot, and after the ladder was broken, it hit a sergeant who climbed the ladder, and the head of the rebel sergeant who was hit in the head burst out, and after the red and white brain slurry flowed out of the wound, it was immediately washed away by the rain, and the sergeant's fate was of course to die on the spot, and the two sergeants behind him were also injured and fell to the ground.

The two hapless sergeants were struck by the next piece of wood, and they died with a whimper.

Arrows shot in the rain are not all lethal, and they can still injure or even kill those who climb the castle at close range.

At the beginning, there were not many ladders erected, and these ladders were quickly pushed away by the Tang army at the head of the city, and those sergeants who were still climbing tenaciously fell into the forbidden ditch together.

Many sergeants were killed or wounded by arrows before they could climb the ladder, and some were killed or wounded by rolling stones and logs thrown down from the castle towers. But they still rushed through the forbidden ditch to the opposite bank, using various methods to climb the western edge of the forbidden ditch, and using the ladder to start climbing the city.

The city was confused, and the rebels under the city could not see the specific movements of the Tang army above.

Even if someone wants to look up at the city, as soon as they look up, the heavy rain will fall into their eyes, and they will not be able to open their eyes at all.

The rebels besieging the city had no way to observe carefully, so they could only "attack blindly". The sergeants who rushed through the forbidden ditch to the bottom of the city wall, and after setting up the ladder indiscriminately, they buried themselves in the city despite the arrows, rolling stones, and sassal trees falling from the city.

Soldiers who were constantly shot by arrows, or hit by rolling stones and sassal wood, fell from the ladder and fell into the forbidden ditch behind them together with the ladder, and the dead immediately became the filling in the forbidden ditch, becoming a stepping stone for the subsequent siege rebels, and those wounded sergeants would inevitably have the same fate if they did not have the strength to get up or flee.

"Prepare more rolling stones and sassal wood!" Wang Sili, who had already been drenched in soup, loudly gave orders to the soldiers around him.

"Yes, General!" The soldiers who received the order immediately went to convey the order.

In Tongguan City, whether it is arrows or rolling stones, and sassal wood are prepared a lot, but Wang Sili knows that the heavy rain has not stopped, and rolling stones and sassal wood will be the main combat weapons, these weapons are large in size, and it is impossible to pile up a very large number of them on the city, which is definitely not enough for follow-up, so he can only order to take materials nearby and prepare more rolling stones and sassage wood, in case he runs out of everything.

The wind had stopped, but the rain was so heavy that I couldn't see the scenery clearly from a distance of more than a dozen steps, and I could only vaguely see the situation below the city when I stood on the top of the city. It is impossible to observe how many rebels are attacking the city, and it is impossible to know how the follow-up rebels marched, how they cooperated, how they crossed the forbidden ditch, and how they landed in the city.

A ladder quickly leaned in front of Wang Sili's eyes, what is surprising is that the upper end of the ladder has climbed a rebel sergeant, this rebel sergeant in the ladder quickly approached, actually jumped over, jumped directly to the city, was startled Wang Sili reacted very quickly, before the other sergeants reacted, waved the horizontal knife in his hand, and cut directly at the head of the rebel sergeant who jumped over.

This is a rebel daring soldier, who went up to the ladder in advance, taking advantage of the fact that the Tang army on the head of the city could not observe the situation clearly in the rainy weather, and jumped directly when the ladder came over, wanting to catch the Tang army sergeant at the head of the city by surprise, and buy time and opportunity for the follow-up people. But he was unfortunate enough to jump in front of Wang Sili, and Wang Sili's vigorous swing of the horizontal knife slashed right at his neck, and the scream only came to an abrupt halt when it was halfway through, and a head flew out, falling directly under the city like a headless corpse.

The blood that splattered out, along with the raindrops, sprinkled on Wang Sili and the other sergeants!

"Watch out for the rebels' jumping!" Wang Sili roared again, asking the sergeant to pay attention to the rebel sergeant's adventurous behavior of jumping directly onto the city wall!