Zhu Yuanzhang also "regretted" this, and in the end he could only turn from offensive to defensive, set up many guards in Monan, and took advantage of the geographical advantage to come to Tuntian to defend against Mongolia. But Lao Zhu is a very suspicious person, he has to sleep with one eye open, he is not worried about his generals leading the troops, so he set up nine Sai kings on the northern frontier and sent his sons to guard the border, and Su Wang is one of them.

Writing this, the question arises again, why did Zhu Yuanzhang have to inherit the Lingbei Province of the Yuan Dynasty? How many troops are under the Nine Great Sai Kings?

Let's talk about the first question first, the Lingbei Province of the Yuan Dynasty has a vast area, probably extending from the Great Wall to the Arctic Ocean, connecting Liaoyang Province in the east, and northeast Xinjiang in the west. In the eyes of ordinary people, Lingbei Province is a bitter cold place unsuitable for human habitation, but in fact, this statement is very wrong. Lingbei is the birthplace of Mongolia, where successive Mongol Great Khans built their capitals. Later, after Kublai Khan and Ali Buge, who occupied Helin, successfully competed for the position of Great Khan, he considered that his power was mainly in Monan, so he moved the capital to Dadu.

However, Mongolia still regarded Lingbei as a "fundamental place", and there was a Yuan area, and the imperial court's construction of Lingbei never eased. From all parts of the country, especially in the south, a large number of manpower, material and financial resources have been mobilized to build Lingbei. In the land of Lingbei, there are many famous cities, agriculture, handicrafts, and commerce are very prosperous, the economy is very developed, the population reaches millions, and hundreds of thousands of cavalry can be raised. That's why Liu Futong said during the uprising that the Yuan Dynasty was "poor in the south of the Yangtze River and rich in the north".

After Xu Da broke through the capital of Yuan, he marked the fall of the Yuan Dynasty. However, Emperor Yuan Shun took the initiative to escape, and the military power of the Yuan Dynasty was not completely wiped out, and there were still at least 200,000 Mongolian iron horsemen in the grasslands of Guangbao in the north, ready to attack the Ming Dynasty in the south.

For this reason, Zhu Yuanzhang wanted to capture Lingbei Province, completely clear the desert, and let his children and grandchildren enjoy peace. However, the defeat in the Battle of Lingbei seriously frustrated Zhu Yuanzhang's plan, and from then on, the Ming army turned from offensive to defensive, and began to set up the king of Sai to defend against Mongolia.

It was not until the twentieth year of Hongwu that after the surrender of Naha, who controlled Liaoyang Province, Zhu Yuanzhang was in great spirits and sent Lan Yu to break the Northern Yuan Dynasty in the fishing sea.

We noticed that the Northern Yuan court had been wandering around the northeast, so why didn't it go to the Mongol Khanate in the west for help?

After Genghis Khan established the Mongol state, according to the Mongol custom of dividing the family property, he divided the eastern region to his younger brother and general, who was the "king of the eastern road", and the western region was divided to his son, who was the "king of the western province". We all know that Kublai Khan's position as Great Khan was snatched by himself, and his opponent was his own brother Ali Buge.

Ali Buge was supported as the Great Khan by the local Mongolian nobles, they all unanimously opposed Kublai Khan's Sinicization policy, and were very dissatisfied with Kublai Khan's lineage, their territory was in the west, there was a Yuan generation, and the relationship between the imperial court and the kings of the West was not very good. After Kublai Khan defeated Ali Buge, he imprisoned him, and later Ali Buge died, which is not clear. Ali Buge's descendants unanimously believed that it was Kublai Khan's poisonous hand, so they hated Kublai Khan's family very much.

The last monarch of the Northern Yuan, Timur, had nowhere else to go after the Battle of Yuerhai, so he fled westward and was finally killed by the descendants of Ali Buge.

And in order to prevent the counterattack of the Yuan army entrenched in the north of Lingbei, how many troops did Zhu Yuanzhang deploy in the north? According to historical records, it can be said that the whole country poured its strength into recruiting nearly 1 million troops to defend the border, and the most soldiers and horses were deployed near Beiping, the most important city in the north.

Therefore, if you are Zhu Yunwen, you won't be able to sleep. In fact, Lao Zhu didn't expect that after his death, Zhu Yunwen couldn't suppress his uncles, but things can't have the best of both worlds, he doesn't worry that others can only hand over the troops to his sons, deep in his heart, he would rather let his son get the country than let outsiders get involved.

Now the troops and horses of the Shaanxi Xingdu Division who defend the Su Domain have not yet reached the full quota, and Lao Zhu has only a few thousand horses for Zhu Ao, but fortunately, there is a "tea and horse market" here in Zhu Ao, and the tea transported from the mainland can be exchanged for the horses of the Western Domain, so Zhu Ao can control about 10,000 horses.

That's enough.

Zhu planned to use a two-horse-drawn cart to plow. A hundred acres can still be sown a day with oxen pulling a cart, but if two horses are used, the efficiency is simply not to look at directly.

If you don't sow a few hundred acres of land a day, you're embarrassed to say hello.

More than 10,000 military horses of the Su Domain were all dispatched, galloping wildly on the vast land west of the river, what a magnificent scene! The sergeants cheered, and the slaves did not dare to be lonely, and shouted congratulations, for they knew that if this efficiency continued, a great harvest would be just around the corner. Good days are coming.

Lan Youcheng also saw such a scene for the first time in his life, took Dai Nu's arm, and shouted excitedly: "Sister, sister, you see those horses running so fast." These five million acres of land should be planted in a few days. The prince is really powerful enough to come up with such a solution. The slave was worried about him in vain. ”

Dai Nu was also indescribably happy in her heart, she was the prince's person, and she was good when the prince was good, and said with a smile: "You, it's still a short time with the prince." The prince has more whimsical ideas in his mind than the stars in the sky, and there will be more times when you are surprised in the future. ”

Lan Youcheng's delicate little face bloomed with a smile, and he looked at Zhu Ao with admiration in his eyes, and said, "Look at it like this, it should be okay for us to have a bumper harvest next year." The prince is really a man of great talent, and he solved the food problem in one year. "His man is of noble birth and is so capable, Lan Youcheng suddenly felt that his heart was about to melt.

As if he had seen through her thoughts, Dainu tapped her on the head and said, "Then there is no need to say." Thank God for letting you follow the prince, a good and capable master. ”

Lan Youcheng was sweet in her heart, but she still had to flatter Dai Nu on her lips, and said, "I will ask my sister for more guidance in the future." Thinking of what Zhu Ao said about the development of Su Fan with her part, Lan Youcheng felt extremely happy.

Li Anyi, who was standing next to Lan Youcheng, also looked at the prosperous scene with a smile, but did not say a word.

On a hillside not far away, Geng Bingwen watched the horse-drawn cart work, while wiping his beard, and said, "King Su is really not simple. Such a big action didn't reveal a little wind in advance, and its thoughts were deep and terrifying. ”

In the Wenhua Hall of the Forbidden City in Nanjing, Zhu Yunwen looked at the secret report from Geng Bingwen, and the worry in his heart deepened greatly. The current vassal king has shown a trend of not falling off, if Zhu Ao is completely solving the food problem, then how can the imperial court control him?