The generals walked out of the camp and saw Sima Yi trampling the frosty ground outside to the mud, and they didn't know what to say.

Sima Yi looked at a piece of mud on the ground and said with a smile: "After waiting for so many days, it finally frosted, the weather has been sunny these days, I look at this weather, it will be frosty for several days, and now the time has come, you can withdraw the army!" ”

Hearing this, the first general said, "General, have you waited so long? Just to wait until the frost falls before retreating? Why is that? ”

"Huh!" Sima Yi sneered and said: "The Shu army has cavalry, and our army is all foot soldiers, once they retreat, Zhuge Liang sends cavalry to pursue, how can we escape?"

If you want to retire unharmed, you can only use the weather! Have you built the waterwheel I ordered you to build? ”

"Dozens of them have been built!" General Wei replied.

Sima Yi ordered: "Pull one over!" ”

"Come on, pull a waterwheel!"

After a while, several soldiers came over with a waterwheel.

Sima Yi looked at the waterwheel and ordered the soldiers: "Open the water hole, and release the water while pulling." ”

"No!"

The waterwheel had several small holes in the rear of the rear, which the soldiers blocked with sharp wooden sticks. Take the stick, and the hole will allow water to flow.

The soldier obeyed the order, opened the drain hole, and pulled the wagon around the aisles of the camp.

Water flows out of the waterwheel, wetting the frosty ground.

"Stop!" The soldier pulled the waterwheel and walked dozens of steps, and Sima Yi shouted to stop.

The generals looked at the water-soaked ground and wondered.

Sima Yi pointed to the wet ground and said, "You guys go up and take a look!" ”

Seeing this, the generals looked at each other and walked to the water-soaked ground.

"Oops!" The ground was frosty, and it was already slippery, and it was wet with water, and it became extremely muddy, and a general had not taken a few steps before he slipped and fell to the ground.

When the generals saw this, they also understood what Sima Yi meant.

Yijiang said excitedly: "General, I understand, you built a waterwheel, and when the frosty weather came, you wanted to use the waterwheel to break off, causing the ground to be muddy, so that the Shu cavalry could not pursue us." ”

"Yes, with this method, we don't have to be afraid of the cavalry of the Shu army!"

"It's still a powerful general, and he came up with this way to retreat without making a sound."

Sima Yi waved his hand and said, "Okay, you guys hurry up and prepare for the retreat, and then send someone to the city to inform the Manchu Shi, the name is three watches to make food, and the fifth watch is to set off!" ”

"No!"

The next day, Wei Jun got up early and had eaten at dawn.

Full of favors, he also brought 8,000 old and weak soldiers and horses in the city to join Sima Yi and retreat together.

Sima Yi personally led the army in front, ordered the old and weak soldiers to be in the back, and finally broke off with a waterwheel.

In the past few days, the Wei army has built a total of 30 waterwheels, and the reserve water of one waterwheel can flow up the mile.

The road to the north is wide, and three horse-drawn carriages are required to travel side by side. When all the wagons are stocked with water, the ten-mile road can be made muddy.

There are many rivers in the south, and the waterwheel can replenish water along the way, ensuring that during the march, the roads that the Wei army passes through will become muddy.

The Han army was behind, and it was obviously impossible to catch up with the Wei army on such a muddy road.

In the camp of the Han army.

As soon as Sima Yi retreated, the Han army scouts came to report: "Great Sima, the Wei army has withdrawn!" ”

When Zhuge Liang heard this, he stood up from his seat and ordered: "Order Zhao Yun to lead the cavalry to pursue, Hugh is going to run away Sima Yi, and the general will order the infantry to follow." ”

"No!"

Zhao Yun surrendered his hand to receive the order, and immediately led the cavalry to pursue Sima Yi.

At this moment, Sima Yi had already led his troops out of the camp, and he did not go more than a few miles to the north, but once he was caught up by the cavalry, he fought in the field, and without the protection of the camp, although the whole army was annihilated, although it was uncertain, at least it would have to suffer heavy losses.

Passing by the Wei army camp, its camp is already an empty camp.

Zhao Yun continued to lead the cavalry to the north, and soon arrived at the official road north of the camp.

Since the water of the Wei army was in the back row, and no one trampled on it, the ground did not look muddy, just a little damp.

Zhao Yun didn't feel anything strange, and led the cavalry onto the damp official road.

The crotch war horse walked like flying, trampling on the muddy ground, just a few steps, the crotch war horse stopped, spinning in place, swaying left and right unwilling to walk.

Behind him, there were suddenly several screams.

The ground became more and more muddy the more you stepped on it, and one of the several cavalrymen was careless, and the hooves of the war horses slipped, and they fell to the ground.

One of the horsemen was unlucky, and when he fell to the ground, he hit a stone on the ground and broke his head on the spot.

Zhao Yun looked at the ground behind him, only to see that the ground had become muddy, and when he looked forward, he saw that the ground was wet.

Zhao Yun sensed that something was wrong, the spear propped up to the ground, helped the spear to get off the horse, and squatted on the ground to observe.

The cavalry in the rear did not dare to do so, and dismounted one after another.

A cavalry general walked over and said to Zhao Yun: "General, this ground has been watered, and now that the weather is getting colder, it will be frosty on the day of Yun, and this kind of ground, once watered, it will become muddy."

I hated it when I was a child, but I didn't play like this less, it seems that this water was ordered by Sima Yi to be poured by someone, wanting to stop us from pursuing. ”

Zhao Yun's face sank: "Where did Sima Yi get so much water?" Let me move on and rush through with one go! ”

"No!"

The cavalry mounted again and continued to move forward under the leadership of Zhao Yun.

After traveling for several miles, dozens of cavalry accidentally fell and were injured.

Yijun chased the horse with difficulty and caught up with Zhao Yun, and said: "The ground in front is dark, it seems that it is all wet with water, we can't continue to walk." General, you see that the ground we passed through is muddy, and when the foot soldiers come over, how will we march? ”

Zhao Yun looked behind him, only to see that the ground had become muddy, and his face couldn't help but become ugly.

The cavalry paid some casualties, it was right to catch up with the Wei army, but the road behind was trampled and muddy, how could the infantry walk at that time? And they still have grain and grass to carry.

There are no foot soldiers to respond, if Sima Yi sets up an ambush in front, he rashly pursues it, and if he doesn't do it, he will suffer a big loss.

Thinking of this, Zhao Yun sighed and said, "This Sima Yi is really not an easy person, let's go back first, please make a decision." ”

Subsequently, Zhao Yun led the cavalry back again, and in order to reduce casualties, this time the cavalry returned slowly.

Walking out of the muddy official road, Zhao Yun saw Zhuge Liang leading an army of troops over.

Looking at Zhao Yun who was returning, Zhuge Liang was puzzled: "Zilong, why are you still here, didn't I let you go after Sima Yi?" Could it be that he was ambushed? ”

.。 m.