Chengtong's trench attack is also a tactic formulated by the Great Sima Mansion to attack Yuanhu Mountain. This was done by digging a trench for men, horses, and artillery to pass through, and then adding wooden beams to the trench and finally covering it with earth to prevent falling rocks and arrows. But the problem is that Yuanhu Mountain has a col, the ridge runs east-west, the col runs north-south, and the trench can only be dug in a few specific cols.

If you don't follow these specific cols, the slope is too big and you can't go up at all. Now Cheng Tong and Pang Nuan are standing on one of the largest cols, or on the mountainside of this col, there are more than three miles of land up, and six or seven miles of land down.

The elevation of this mountainside is about 1,300 meters, and the elevation of the mountain pass three miles away is more than 1,400 meters according to previous investigations, and the slope is more than 10 percent and close to 15 percent. The peaks on both sides of the col are more than two thousand meters above sea level, not to mention the slope, and some places are still very rugged, even if the soldiers can climb up, they will be driven down by the Qin army guarding the top of the mountain.

In addition to the col, the other is time. It took a lot of time to dig up the trenches for three or four miles, and this was due to the night attack - although the Chu army did not capture the mountain, the ten-mile slope captured at least six and a half miles, and the Qin army defended on the col three miles away. This is not the case with the rest of the mountain passes, where the Qin army not only guards the mountain passes, but also guards the halfway up the mountain. The more than 10-mile-long mountain col has to dig out the trench and then cover the beams and cover the soil, plus the fighting between the two sides, it will take at least a month.

Pang Nuan didn't say anything, just sighed heavily, and then shook his head again and again. Cheng Tong looked at him and said, "The king doesn't like to be clever, and the trench attack is a ruler and a ruler, so ......."

"It's not that the king doesn't like ingenuity, isn't that ingenuity?" Below the two men, the soldiers in the col shouted trumpets, and a steam engine was dragged up from the bottom of the mountain. This thing is dead and heavy, but fortunately, the appetite is not picky, and charcoal, wood, firewood and grass can be burned.

"It's a feat." Cheng Tong laughed. This thing was dragged up to pull the cannon. The artilleryman took out the forty-five pounds of siege guns at the bottom of the box. These siege guns weigh more than 10,000 pounds, and even if the ground is flat, it will be towed by fourteen horses, and there are countless horses needed to go up the mountain, so it is not so troublesome to drag them with a steam engine.

"The ingenuity of the strategy, the ingenuity of the skill, in fact, are all ingenuity." Pang Nuan looked at the heavy steam engine in the col and shook his head repeatedly. He remembered that it seemed to be called a horse, and the actual weight was no different from that of a trebuchet, and he really didn't understand the use of building it. "Once the Qin State is destroyed, it will not be restored. A trick is enough, so why do you need a horse? ”

"Lin Wujun is mistaken! The Fur Horse could not only tow artillery, but also plough the fields. "In addition to Chengtong and Pang Nuan, there are also artillery generals and engineer generals who will defeat the enemy. Chengtong was polite to Pang Nuan, and when he heard that it was useless to ask for horses, he couldn't help but refute it. When he spoke, he smiled lightly, and he couldn't see his attitude.

"This thing can also plow the fields?" Pang Nuan looked at the enemy, and saw the word 'strike the enemy' under his armor coat emblem, and knew that he was also a disciple of the surname Mi. The enemy is the son of the first king of the king, the king of the first king of Ping rebelled, killed the son of the king of the spirit to strike the enemy, and his descendants took the enemy as their clan.

"Yes." There are only three things that the artillerymen care about on weekdays, artillery, gunpowder, and towing gear. Ryoma is the best traction gear, and even better than Ryoma is the steam engine. "At least two hundred acres of Chu can be cultivated in one day, and I have seen it with my own eyes, and the horse is the treasure of my Chu country!"

He recalled the scene of the steam engine ploughing the field that he had seen before: two Fu Yao horses were placed parallel to each end of the field, connected by a huge silk rope in the middle, and the iron pear was tied to the giant silk rope. Just like the reel on the repeater, the silk rope is wrapped around the reel, and as long as it is turned to the reel, it can drive the iron pear in the middle to plough the field. Every few ridges of ploughing, the horses will move forward a few steps and plough again, or simply push while plowing.

According to the Yin Mansion, on the most one day, two Fu Yao horses ploughed 278 acres of Chu land (180 city acres). If these two hundred and seventy-eight acres of Chu are cultivated with Qin cattle, at least ninety Qin cattle will be required. In terms of the cost of use, it is cheaper, and two horses will not work more than three tons of coal a day, and even if it costs 70 yuan per ton of coal, it is only 210 yuan.

And small families don't have so much land to cultivate. Under the crop rotation system, more than 40 acres are planted a year, and the coal money is only 30 or 40 yuan. Even if there is money for machine depreciation, breakdown repair, and craftsman labor, the cost of a family to cultivate the land is about 100 yuan, which is of course cheaper than raising cattle to plow the land.

"If you can't fight, why plough the fields?" Chengtong was a little unhappy. Originally, it was talking about the war, but in the end, it was actually involved in ploughing the fields.

When he said this, he reminded the enemy, and after he was stunned, he hurriedly said: "This is the fault of the minister." However, the ministers thought that Fu Yao horses could tow artillery during war, and they could plough the fields on weekdays, and the more such clever things in the Chu State, the better. If you talk about war, if the forty-five-pound cannon can be dragged here, you don't need to attack it without trenches. ”

"Oh?" Cheng Tong was taken aback by his last words. "How to attack it?"

"The subordinates thought that they could bombard it with artillery first, and then send the soldiers of swords and shields...... "The enemy said that he had learned what he had learned.

"Not feasible." Pang Nuan was very surprised that Fu Yao Ma could cultivate more than 200 acres of land a day, he never thought that this thing would be of such use, but he was a little unimpressed by the method proposed by the enemy to attack the mountain pass. "The narrow part of the mountain col is only four tracks, and the Qin people built a fortress in the mountain pass, and shot with a crossbow at a high level, and the big shield can be blocked ......"

"Lin Wujun, please listen to me first." The enemy understands what Pang Nuan means, but Pang Nuan doesn't understand what he means. "I will not want the sword and shield soldiers to take the mountain pass, as long as they set up a large concrete pile near the mountain pass......"

None of the people present had ever seen Fu Yao ploughing the fields except for the enemy, and he finally squatted down in a hurry, and he drew a simple map on the ground: the position of the mountainside where he is now, the location of the mountain pass three miles away. He pointed to the mountainside and said, "The cannon is here, too far from the mountain pass." If you can erect a large concrete pile near the mountain pass, add a roller to the pile, and lead it with a huge wire rope, and the 45-pound cannon can be dragged here. What is the use of the Qin people to build a fortress? It was destroyed by shelling. ”

Two horses must be placed at both ends of the field to plough the field, can one be? Actually, one is fine, but there must be a strong and reliable pile, and this large pile should move parallel to the Fuyao horse on the other side of the field. The tow cannon is not ploughing the field, but the principle is similar: simply a large concrete pile is poured near the mountain pass, and the cannon can be dragged there by pulleys.

If the muzzle of the gun is only one or two hundred steps away from the mountain pass, it will be easy to blast through the mountain pass, but this kind of task requires heavy artillery to be competent.

"If the Qin people hit me with a stone, wood and thorn crossbow, supplemented by fire, ......" Cheng Tong carefully looked at the sketch drawn on the ground by the enemy, and did not say that it was feasible, but his expression already felt that this was indeed a feasible strategy.

"It can tow more than 10,000 catties of artillery, and naturally it can tow the rushing car to the vicinity of the mountain pass." Strike the enemy. "Covering up with rushing cars, I am not afraid of stones, woods, crossbows, and crossbows, nor am I afraid of the fire attack of the Qin people."