The planning and construction of the fortress in Anding County had already begun, and it was inconvenient for Pei Gai to change the order, but after repeated thoughts, he still used Tao Kan's middle strategy at the same time, and moved part of Xirong to the Jingshui Valley to replace the original Lu Shuihu.

Mainly because there are too many Rong departments in the three counties of Nan'an, Jincheng and Xihe, regardless of Pengqiang and Tuyuhun in Caohan, only Mozhi and Wuyi in Longxi, Chiting in Nan'an, and a few Qiang people and Zahu, one or two hundred thousand people, all of them are crowded in the east from Pingxiang, west to Shouyang, north to Dadidao, south to Xiangwu, which is less than 100,000 square miles, plus the Jin people, the population density is almost the crown of Qinzhou. For a large city, this may not be a big deal, and it is a little sparse for a farming people, but as a nomadic people who have to live in pursuit of water and grass - although many of the above-mentioned Di and Qiang have already converted to agriculture - it is too narrow.

If Xirong is dense, it will inevitably expand externally or cause internal disputes, which cannot be solved by policy. If they expand externally, they will invade the Jin land and harass the Jin people, even if they have internal disputes, they may be like raising Gu, and eventually fight a large tribal alliance.

Therefore, Pei should send You Yao to lobby, and summoned Yao Yizhong to come, talk heartily, let Yao Qiang set an example, and move east to the real border of Anding County. In this way, it took more than half a year of hard work to move six or seven tribes and 100,000 people one after another to assist the front army in garrisoning and stabilizing.

At the same time, soldiers were recruited from these Di and Qiang—of course, they still had to be sent to the vicinity of Chang'an for training and brainwashing—in order to enrich the ministries. This is a later story, so I won't mention it for the time being.

As for Feng Yi's defense, he used Tao Kan's best strategy. Tao Kan was in Fengyi County to the west of Hu Han and Liu Yao in the north, so he naturally repeatedly sent spies to survey the topography of the mountains and rivers going to Gaonu, and drew a detailed map for this purpose. However, it is said to be detailed, there is no contour line, and it is not as clear as the sand table, he explained it for a long time according to the map, and Pei Cai can roughly feel the doorway.

Tao Kan suggested that the two roads go north, and the east road is along the Shangluoshui River Valley. There are some treacherous areas in the river valley, and as long as you first set up a horse rejection on the road, and then build a few guard towers on the nearby hills, you can stop the invading enemy. The first fort was set up in the territory—although the border line of the month was not so clear-cut—eighty miles north of Suyi, probably near the later county of Huangling. Of course, Pei should not remember the name of the place in later generations, and he gave the fort a name, called "Kill Yao".

The west road starts from the ancient city of Qiyuan outside the territory of Beidi County, which belonged to Shangjun in the Han Dynasty - when it is eighty miles southwest of Kill Yao Fort, there is a small road leading to the east road to protect Beidi County. After the two bases are completed, you can continue to separate from the Kill Yao Fort to the north, and the east road is still along the Shangluoshui River Valley, to the vicinity of Ganquan County in the old Han Dynasty, and every two days, seventy or eighty miles, and then build two forts. The west road is thirty to sixty miles west of the east road, twists and turns, and builds four bases in total, after going around the high slaves.

When these fortresses are all completed, they can roughly advance to the bottom of Liu Yao's nose and form a semi-encirclement trend. Let's see if you Liu Yao dare to fight!

In Pei Gai's mind, there is another plan, that is, to use five to ten years, whether it is the Jin people in Guanzhong to breed or move the Jin people into the customs from other places, they can gradually enrich the area between the fortresses - perhaps also add a small amount of Xirong - so that not only will the border line be pushed north, squeezing the living space of the Hu people, but also the actual territory of the Han and Han dynasties will be restored.

In the Han Dynasty, there were Shangjun, Xihe, and even Shuofang, Wuyuan, and Yunzhong in the north of Fengyi, and reached the Hetao area. Pei Gai's ambition is not only to restore the old frontier of the Western Jin Dynasty, but also to restore the Han Xinjiang and even build the unification of the Tang Dynasty ahead of schedule.

The two were discussing the construction of the fort, and suddenly a rear army sentry came to report, saying that the Hu and Han soldiers and horses were gathering to Caisangjin one after another, and it seemed that there was an intention to cross the river and attack. When Pei Gai heard the report, he was slightly stunned, and then smiled: "It's finally here." ”

Tao Kan glanced at him and said slowly, "Liu Cang came very late......"

The counties of Hedong, Pingyang, and Hanoi, where Hu Han lived, were the richest places north of the Yellow River, and the land was developed earlier, and a large number of people were taken away from Henan and Guanzhong one after another, so theoretically speaking, it had replaced Henan as the richest place in China. In terms of productivity on paper, the Hu and Han regimes still rank first in the world, with Yan, Yu and Sili in Henan, ranking second, Pei Gai's Yong and Qin prefectures, and Shile's Ji and Ji two prefectures, roughly tied for third.

If it weren't for the success of Pei and Zu's Northern Expedition, a large number of southbound immigrants would have returned to the north, and they might have had the opportunity to jump to third, but now they can only tie for fourth with Bashu. And even if Pei Gai adds the distant Xuzhou, and Shi Le adds the new Youzhou half, it is difficult to compete with Pingyang and Luoyang in terms of the number of traditional cultivated land and the number of households.

Therefore, it is impossible for the Pingyang regime to stay still all the time, but only to defend the Yellow River. Last year, the big locusts in Bingzhou affected Pingyang and Hedong, and Liu Cang and Liu Yao were all newly defeated, and they were forced to rest their troops and raise horses, and they were dormant for the time being, which can still be said. This year, the locust plague moved to Jizhou, and Pingyang, like Guanzhong, is a normal year, so it is impossible to have no movement.

Besides, when Liu Yao invaded south, didn't he have the instructions of Pingyang? Without Pingyang's order, even if Liu Yao dared to come, Liu Hu might not be willing to move, which was clearly a sign of an attack on the Guanzhong region, if not a full-scale attack.

It's just that if the two sides cooperate closely, when Peng Fuhu enters the stability and Liu Hu goes down to Feng Yi, Liu Cang will brazenly wave his army to the west, which will inevitably cause strong pressure on Tao Kan's great Sima rear army. Tao Kan had already taken precautions against this, and had already drawn up a number of plans to send to Pei Cai's case, and also planned to retreat to Dali again in case of unfavorable war, use the solid city defense to resist Hu Shi, and then ask Pei to send a steady stream of fresh troops to the front line - and even transfer Zhurong in Qinzhou to conscript.

However, the actual situation did not develop to that point, Liu Cang was half a beat slower than Liu Yao, and he had to wait for Peng Fuhu and Liu Hu to be repulsed. Of course, this is due to the fact that communications and transportation are underdeveloped, and it is difficult for two armies that are far apart to cooperate closely, but is there no deeper reason for this? After all, Liu Cang is not a stupid uncle.

That's why Tao Kan said: "Liu Cang is coming very late...... Pei Gai stood up, put his hands behind his back, looked at the outdoor scenery through the window lattice, and said slowly, as if talking to himself: "Autumn is coming to an end, the cold winter is coming, even if the hundred-legged insect is not dead, it is stiff." ”

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When Liu Yao was still doing Xiangguo and Da Shan Yu, he was rigid and self-serving, monopolizing the government, but when he finally got what he wanted and was promoted to the crown prince, his posture was relatively lowered, and he was willing to listen to the opinions of many old ministers. This is mainly because his main goal was to crush Liu Yi before, and this matter cannot be sought by the public, and the old ministers may not be willing to help with ideas; And when the crown prince's throne was finally in hand, seeing that the emperor's throne was out of reach, and it seemed that there was no one who could shake his power, Liu Cangcai finally shifted his main energy from seizing power to state affairs.

Coupled with the defeat of Henan and Liu Yi's "Qingjun side", it also poured cold water on this young man's ambition to some extent, making his arrogance gradually subside.

Therefore, in the face of the new situation, Liu Cang summoned Taishi Liu Jing, Taifu Renyi, Taibao Zhu Ji, General Liu Ji, Dasitu Liu Li, Sili Captain Qiao Zhiming and other important ministers to discuss countermeasures, and finally came up with a strategy:

"Use Shile in the east, Liu Yao in the west, Xianbei in the north, control the river in the south, and then seek Henan and Guanzhong."

For this reason, not only did he add Shi Le as the Duke of Zhao, but also worshiped Shi Hu, the general of Jinyang, as the general of the expedition to the north, and sealed the Duke of Dangxian County, and at the same time sent an envoy to the north to try to form an alliance with Tuoba Xianbei. Yu Lu's statement on this face is: "I am the king of Jin, and I will never betray Jin." Privately, he hinted that they could exchange markets at the border - because of Liu Kun's defeat, it was difficult for Tuoba Xianbei to get supplies from the Central Plains, and he didn't have the confidence to defeat Shihu for the time being, so he had to discuss with Hu Han to ask for it.

It can be seen that under the premise that the situation is basically unchanged, it is unlikely that Tuoba Yulu will move south on a large scale, and if the situation is deflected in all directions in the direction of Hu and Xuan, Yulu may also have the possibility of Xu Meng or even being a vassal to Han.

Since the northern front is worry-free for the time being, it is necessary to try to use troops against the south. Liu Cang himself advocated crossing the river from Hanoi and taking Luoyang directly, or crossing from the southeast of the river to cut off the connection between Henan and Guanzhong, believing that this was the only way to dig out the heart. He said: "If Sima Ye is in Chang'an, where it is far away, or it is not easy to take, God is fortunate to return to Luoyang today, and I am separated by a water." If Luoyang can be broken again, or captured or chased Sima Ye, the spirit of the southerners will fall, and the revival of the emperor and Han can be expected! ”

However, his younger brother Liu Ji, the king of Jinan and the general, raised objections and said: "Brother, there is a shortage of grain and straw in the country today, and the people of all departments are not aligned. The reason why the sun was able to break Luoyang was because of the discord between his important ministers, Sima Yue and Gou Xi contended, and at that time Zhao Gong and Wang Mi were still in Henan, even if there was no victory in Ningping City, I surrounded Luoyang, and Sima Yue and others did not come to the rescue. Today it is different, the ancestors are dying of Yan and Yu, flattening and separating, Pei the town guards the pass, and can arrive at Luoyang City in the next day. If Pei should come to the rescue when I attack Luoyang, or even Wang Dun will also go north from Jingzhou, his situation will be in danger......"

Liu Cang waved his hand and shook his head, and said, "Do you still think that Pei should be the pure minister of Jin?" I have already said that he returned to the Jin lord and stayed in Taiguanzhong because he wanted to be the king. ”

Captain Qiao Zhiming said: "Only in this way can we worry." If Pei should support the Jin lord in Chang'an and be attacked by me urgently, Zu Ti may not go to the rescue, but will ask the Jin lord to move to Luo. Now that the Jin lord is still less than a year old, how can he return to Chang'an? If Luoyang is in danger, Pei should not stand idly by. Jin has issued an edict to ask Sima Bao, then Sima Ye will be defeated, Pei should not be able to reinstate Sima Bao in Guanzhong, the rest of the Sima family, the prestige is also insufficient, how can he lose this banner of righteousness, and become the common enemy of the world? ”

Liu Cang hung his head and was silent.

Liu Ji continued: "The younger brother thinks that instead of attacking Luoyang, it is better to try to win Guanzhong. If you attack Luoyang, you must ask Zhao Gong to send troops to Yanzhou as a countermeasure, but when you hear the locusts in Jizhou, Zhao Gong may not be willing to send troops, but I am alone in the southern army, and the chance of victory is slim. If the attack is in the middle of the attack, you can make King Yong go south to hit his flank......"

Liu Cang asked, "What if the ancestors go to help?" ”

Liu Ji replied: "You can order Zhao Gong to feign crossing the river to contain Zu Ti." Now that the lord of Jin is in Luoyang, how can Zu Ti be willing to take the capital and lead the main force to the west to save it? If Luoyang is attacked, then as the younger brother said before, Pei should have no reason not to save it. ”

Taishi Liu Jing also said: "Today, the elite of the country are all in Pingyang, and Hedong and Hanoi are vertical and horizontal. If you attack Luoyang, you must go from Hedong and Hanoi, the road is far away, if they suddenly have different intentions, I am afraid that they will cut off my luck. And if you tackle the key problems, you can cross the river 200 miles west from Pingyang, and the journey is close and ...... safe."

Da Situ Liu Li took the opportunity to interject and said: "This year is expected to be an ordinary year, but the ministers calculate in advance, and the income after the autumn may not be abundant, I am afraid it will be difficult to support the army to go out for a long time." It is Yichen who agrees with what Taishi said, rather than going far to Henan, it is better to go close to Guanzhong. ”

Qiao Zhiming said: "There is an edict before the Jin lord to crusade against Sima Bao, then after the autumn of this year, Pei Gai may go west to conquer Qinzhou......" Liu Cang bowed his head slightly, Qiao Zhiming got this encouragement, so he said boldly and confidently: "If he does not conquer Qinzhou, then Sima Bao will cut off the Longdao again, if I cross to the west, that is, the Zhang family of Liangzhou cannot be saved, and the enemy will inevitably be defeated; If he goes to Qinzhou, I just take the opportunity to capture Feng Yi, Feng Yi, Pingchuan, can reach Chang'an. ”

Liu Cang groaned: "I originally intended to attack Luoyang, I wanted to summon Shi Le to lead the division to join, but what the general said is very true, Jizhou locust, Shi Le may not come......" As he spoke, he snorted softly from his nostrils as if intentionally or unintentionally - "However, if you attack Chang'an, will Liu Yao dare to be ordered to flank with a defeated army?" ”

Qiao Zhiming said with a smile: "If the minister has a word, or if he is offended, His Highness should not be guilty." ”

Liu Cangdao, don't worry, say it boldly, I don't blame.

Qiao Zhiming said: "His Royal Highness was forced by the situation to seal his Yongwang, and the land in Guanzhong was originally owned by Yongwang. Now, if His Royal Highness leads his division to the west, and he gets Feng Yi and even Chang'an, will he not be able to give it to King Yong? If he is willing to come, there is still something to say, if he refuses to come, it is just right to revoke the title of King Yong. In such a situation, King Yong must also understand that he is unwilling to watch from the wall according to the soldiers. ”

Taibao Zhu Ji also suggested: "The courtiers can Zhaolou Fugong (Liu Hu) go south, meet with King Yong, attack Feng Yi first, and I take advantage of the situation to cross the river and go west to ......"

After careful consideration, Liu Cang finally accepted the suggestion of Liu Ji and others, so he began to calculate the harvest, distribute materials, mobilize soldiers and horses, and plan to cross the river to the west. In this way, there was Peng Fuhu's incursion and stability, and Liu Hu's southward Feng Yi.

However, the cooperation between the two sides was extremely bad, and it was not until Peng Fuhu and Liu Hu all withdrew that Liu Cang was late. Why is this happening? In fact, as Pei Gai said: "A hundred-legged insect is stiff if it doesn't die." ”

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