After a hearty heavy rain in Nanshan, the air was humid and cold in the middle of the night, and even the night wind was not as fast as before.

In the position of the left army, bonfires were burned in the military tents surrounded on all sides, and the stars were clearly visible in the exposed skylight.

I don't know if it's an illusion, or because the terrain of Nanshan is higher than Jingzhou, Ma Chao can see the stars more clearly here, as if looking at his own fate, he used to be panicked and depressed, but now he sees it very thoroughly, thoroughly, and he can treat it rationally and calmly.

The fire pond crackled, and a few tiger roars came from time to time in the mountains to the north, and Ma Chao was still studying the sand table.

The flash flood broke out on a small scale, and the river valley and river beach that were convenient for marching have been flooded by turbid floods at this moment, and Ma Chao's humble camp was built on a gentle slope, next to a river, which was originally three or four zhang wide and could submerge the knees deep, but at this moment it swelled ten zhang wide and the depth was unfathomable.

Outside the military tent, Zong pre limped to the tent with a limp of mud, first picked up the bamboo piece and scraped off the mud of his leather boots, and then untied the curtain and bowed in, his shadow was reflected on the curtain by the firelight, and walked inward, the shadow continued to expand, elongated, and deformed.

Inside the tent, Zong stretched out his hands to bake the fire: "The morale everywhere is stable, and they all believe that there will be nearly ten days of sunny weather after this rain." When I asked the nearby mountain people, they said that after such a rain, there would be fog tomorrow, accompanied by light rain. As far as the road surface is concerned, it can be dried within two days, and it will not affect the driving of cars and horses within three days. ”

Ma Chao squinted at Zong Yu: "I have already made a judgment on this matter, and I have notified all battalions, which should stabilize morale." After all, the loose soil of Nanshan is conducive to drainage, and the terrain is very different, and the rainfall goes away with the river ditch, and there is no accumulation. Therefore, two or three days later, our army was able to cooperate with Chen Gong as planned and advance in unison. ”

Picking up the tea bowl, Ma Chao wandered around the sand table, took a sip of tea and swallowed it slowly: "But tomorrow the road will be muddy, and although the flood will subside, the transmission of military information will still depend on the legs of the sergeant." Now I am still worried about Jiangdu. ”

Zong Yu blinked, and also came to the sand table, staring at the location of the left army's main formation...... This valley happens to be one of the tributaries of the headwaters of Danshui.

The rainfall from the south mountain will form a flood that will be divided into two, the rainfall from the north will flow into the Yellow River in the north along the Bashui and Chanshui, and the rainfall from the south will flow from the Danshui to the Han River and the Yangtze River.

Such a heavy rainfall can quickly raise the water level of Hanshui.

With the speed of the flood, within two days, the Jiangdu side will know about the flood.

If the flood information is transmitted to the Jiangdu side due to observation errors or artificial expansion during the transmission process, it will cause serious consequences.

The flood rushed down the Danshui Valley, and the sergeants, government soldiers, and civilian servants stationed and transported in the Wuguan Road could also see the flood peak formed by the rainfall from the upstream source, which was not conducive to morale.

Zong Pre's fingertips touched the ink-dyed sand table, staring at the location of the mountain, which is where Lantian Pass is located, and it is the focus of the Huya Army and the Eagle Yang Army.

At any time, the valley and valley landform can be relatively open, and the decisive battle is conducive to the defenders, who can occupy various terrain to defend the high ground with reduced troops, and more troops can be used as reserves and mobile troops.

However, the attacker's strength is limited by the width of the battlefield and cannot form a large horizontal formation to advance, so it can only advance in a serpentine manner.

Engage in battle at the front, arrive at the rear...... It will also consume a lot of energy, and it will not be possible to make high-intensity breakthroughs.

If the main force attacks after three days, it is possible to march in the valleys and valleys, but when it is time to attack the mountains, because of this rain...... There will be many difficulties.

After five or six days, when the surroundings are completely dry, it is a good time to attack the high ground.

The grassy slope has the ability to store water, and now it looks very strong, and it is no problem for a few people to climb; But as soon as there are many people, they will trample into mud, and it is difficult to climb and attack.

He was embarrassed here, and on the other side, Tian Xin took a nap, woke up in the middle of the night, and watched the gradually descending flood peak on the bank of the Danshui River in the south of Shangluo City.

The benefits of such heavy rain are obvious, meaning that the probability of further heavy rain in the coming week is very low, and there is a limit to the amount of rain clouds that can accumulate in an area.

However, no one can say for sure how the climate will change, and it has been three consecutive years of drought so far, and it is very likely that it will rebound next year with more rainfall.

It's a bit like playing a slot machine to guess the size, three small in a row, and the probability of the fourth small is still half, but do you think it's half?

This is gambling, fascinating, and the more obsessed you are, the more you feel that you can master it, and it is time for you to be swallowed up by it.

Looking at the calm, turbulent and surging flood in front of him, Tian Xin blinked his eyes from time to time, thinking and analyzing the possible movements of the Wei army.

If Wu Zhen took the stud and brought the main force to fight a decisive battle with himself, then the main battlefield of this decisive battle would be in the valley passage of Lantian Pass, in all the slopes, rivers, valleys, and valley passages within a radius of 100 miles.

The secondary battlefield is under the hegemony, if Wang Zhong retreats to defend the hegemony, then the Yangwu army and the left army are divided into two, one resists the Wei army of the hegemony, and the other surrounds the back of Wu Zhi, which is enough to kick Wu Zhi's ass.

The two sides of the Bashui are the overpowering plateaus, the north shore is the Bashang Plateau, and the south bank is the Baxia Plateau, which has absolute control over Chang'an, as long as the Bashang Plateau is controlled, there is a terrain advantage to attack Chang'an.

Ba Shang Yuan is located in the upper reaches, which is very conducive to defense, and in the war related to Chang'an, there is a place for Ba Shang.

Different from the Bashang Plateau, a piece of loess plateau in the upper reaches of Bashui is called Luyuan.

The vast loess plateau in these areas was cut by Bashui and Chanshui, so they had different names, and then Bashui and Chanshui withered, and these loess plateaus had a common name: Bailuyuan.

If there is a rain of this scale five days later, then we can't pay attention to any tactics, and we can only wait for the weather to dry a little bit, and launch a decisive assault on the Wei army, either through the Wei army by ourselves and gather and annihilate Wu's Yongliang army in Lantian, or we will annihilate the whole army.

There is no way back, and if you retreat, let alone enterprising Guanzhong, just the various temptations, confrontations, and involutions in the court are enough to make people depressed.

Outside Chang'an City, Wu Zhen rode on the bank of Bashui to watch the surging flood at night, and a heavy rain in Nanshan was just a light rain for Chang'an, just to relieve the last bit of heat at the end of summer.

The dull sound of the tide from the flood rush is now similar to the sound of drums.

As long as there is another rain of this scale in the future, it will be enough to boost the morale of the whole army, and the hope of holding Lantian Pass is in front of us, and like the help of heaven, we will try our best to fight this battle.

As long as you resist the onslaught of the Beifu soldiers, another rain like this, not to mention the increase in your own morale, is only the attenuation of the morale of the Beifu...... All are deadly.

As long as he withstands Beifu's counteroffensive this year, he will have enough prestige and time to clean up Yongliang Erzhou, and he will no longer be afraid of Beifu's invasion.

Victory, the hope of final victory lies in this battle!

Do you mobilize troops and press them to Lantian?

If you delay for a few more days and wait for the ground to dry, causing the defenders of the mountain passes in various mountain passes in Lantian Valley to surrender and flee, and the Beifu soldiers to break through Lantian Pass, then it will be you who is passive.

At that time, his troops were reduced and his morale was also weakened, but he had to take the initiative to set up an ambush to besiege the Beifu Striker...... This result, no matter how you look at it, is a bit small.

Moreover, the loss of Lantian Valley and the Bashang garrison is a big loss, and it is difficult to explain to the emperor.

When the strategic disadvantage is unavoidable, sacrifice these garrisons, as long as the decisive battle is won, then the past can be explained.

Now a rain brings new fighters, and salvation should take advantage of the situation.

After thinking for a long time, Wu Zhen sighed lightly: "If you don't take it, you will be blamed for it." ”