After Xu Huizu went to Shaanxi, based on various considerations, with the consent of Zhu Yuanzhang, Zhu Yunwen decided to make a major adjustment to the martial arts officials and teachers, Qi Tai was appointed as the left attendant of the military department, He Fu was appointed as the general of Pingqiang, Mu Sheng was appointed as the left governor of the rear army, and Tie Xuan was appointed as Shandong to participate in politics. Based on the opinions of Ru Yu, Qi Tai, Tie Xuan, Huang Zicheng and others, it was decided to let Chen Di, the left political officer of Shandong, serve as the secretary of the martial arts, the imperial history of Jingqing as the secretary of the city, the secretary of the Dali Temple, the secretary of the Dali Temple, the commander of Miyunwei, Ping'an, the cavalry instructor, the commander of Jinanwei, Shandong, the commander of the Shandong Jinan Wei, make Sheng Yong the firearms instructor, and the commander of the Datongwei Chen Zhen as the infantry instructor. Among these people, Zhu Yunwen only knew Sheng Yong and peace, so Zhu Yunwen summoned these people for an interview, and he was more satisfied, and couldn't help but sigh that at the beginning of the founding of the country, the nobles had not yet decayed, and the commoners also pursued progress, so there were a lot of civil and military talents. In addition, due to the low level of martial arts, Chen Di, Jing Qing and Bang Zhao's Yulu have all declined a little, so Zhu Yunwen obtained Zhu Yuanzhang's consent and retained their original grades and Yulu, as for the position rating of martial arts, Zhu Yunwen could not adjust it, because the level of Guozijian was like this.

After two days of dealing with political affairs, Zhu Yunwen gradually understood how difficult it was to maintain such a large empire, the backwardness of the industrial level led to no means of transportation such as automobiles, and there were no means of telegraph, telephone and other means of long-distance communication, and the edict transmitted from the imperial capital to the north took a month to return at the earliest, so he had to give full authorization to the frontier soldiers, but this made the emperor of the Beijing division worry that the frontier soldiers would support their own troops; In addition, there is a shortage of water in the northwest, the grain output is very low, and it is very difficult to transport grain in the case of relying on manpower, animal power and primitive roads, so since the Tang Dynasty, due to serious soil erosion, Guanzhong cannot build a capital, and naturally it has also lost the ability to support the northwest, resulting in five generations later, the northwest fell into the hands of the Hu people. The establishment of the Ming Dynasty, although efforts to expand the border, but only to Jiayu Pass, away from the Han Dynasty's Yumen Pass, the sun is thousands of miles away.

Therefore, the method that Zhu Yunwen could think of was to take two steps, one is to increase grain production, and the other is to improve the combat effectiveness of the army. The solution is to conserve soil and water, introduce improved seeds, use chemical fertilizers, develop firearms, and research into steam engines......

Zhu Yunwen recently spent a lot of time at the College of Engineering, where they used water conservancy equipment to crush ore and produce fertilizer, and let the College of Agriculture test it; Then there is to gather a group of textile craftsmen and let them study more efficient spinning and weaving machines; Finally, in terms of wargames, firearms craftsmen were asked to study the most primitive artillery and grenades, but fortunately, grenades were relatively easy to make, and they were basically finalized, and artillery was gradually experimenting. For this reason, Zhu Yunwen specially designated the work regulations, gave the craftsmen great autonomy, and provided heavy rewards, Wang Quan, the dean of the School of Engineering, gradually found a feeling, doing things more and more smoothly, and the staff of the School of Engineering also became more and more, and a large number of craftsmen moved in from all over the country, resulting in Yan Zhenzhi, the secretary of the Ministry of Engineering, was a little dissatisfied, but fortunately, Zhu Yunwen promised that the results of the Institute of Engineering would be given priority to the Ministry of Industry, and Yan Zhenzhi was satisfied.

After more than ten days, Zhu Yunwen found the information written by the Ministry of War about the soldiers and the guards when he was reviewing the folds, and after reviewing the urgent folds, he picked up this material and looked at it in detail, and found that it was written in great detail, and the information of the soldiers of the Tang Dynasty mainly came from the military records of the old and new Tang books, as well as Chen Fuliang's "Military System of the Past Dynasties" of the Southern Song Dynasty, and the guards also summarized the most recent information. Zhu Yunwen watched it three times and had a general understanding of the government military system and the guards......

The government soldier system, from the Western Wei Dynasty and flourished in the Tang Dynasty, originated from the nomadic people's out of the soldiers, into the people's tradition, when the Xianbei people into the Central Plains, the Xianbei people gradually became the government soldiers, the so-called government soldiers, is subordinate to the military soldiers. With the escalation of the war and the decrease in the number of Xianbei people, the Han people gradually became government soldiers, and by the Sui and Tang dynasties, government soldiers became a formal military system. In the Tang Dynasty, there were 634 Zhechong Mansions inside and outside the Guan, as many as 261 Prefectures in the Guannei Road, 1,200 Shangfu soldiers, 1,000 Zhongfu soldiers, 800 Xiafu soldiers, and a total of more than 600,000 government soldiers in the whole country. The advantage of this system is that the burden of the country's military expenditure is very light, and the soldiers are separated, so there is no problem of self-respect for the army.

But there are also many problems in the government military system, the government military system is based on the nomadic military system, so it is similar to the robbers, if the expedition does not win, can not get rewards, or the expedition time is too long, it will lead to a relative reduction in capture, then the government soldiers will become more and more poor, and then affect the fighting spirit and combat effectiveness of the government soldiers, if there are too many government soldiers killed in battle, it will discourage the peasants and cannot replenish the government soldiers. Therefore, when the overall strategy of the country changes from offensive to defensive, there will be problems, a large number of soldiers are required for defense, the service time is too long, and there is no capture and reward, these characteristics are contradictory to the government military system. Therefore, after the middle of the Tang Dynasty, the government military system collapsed and was replaced by a conscription system.

The Wei system of this dynasty is not the first, it originated from the Wei system of the Yuan Dynasty, the Yuan Dynasty started with looting, so let the Han people carry out the tuntian in a semi-slave way, so as to facilitate the rapid resumption of production and satisfy the pleasures of the Mongolian aristocracy. When Emperor Hongwu drove out the Yuan soldiers, he obtained a large number of guards, and long-term wars, the land is vast and sparsely populated, so after the army occupies the land, often let the army settle in the field and establish the guard. This is especially true in the frontier, so the guards are all over the Ming Dynasty. In the twenty-sixth year of Hongwu, there were 329 internal and external guards, each guard was 5,600 people according to the establishment, and the national guard soldiers were about 1.5 million, and the average annual salary of each guard was about 18 stones, so the national army needed a total of 27 million stones. In the same year, the amount of summer and autumn taxes was 25 million stone of rice, 4.7 million stone of wheat, and 288,000 horses of silk. At present, the guards are basically self-sufficient, relying on a small amount of local subsidies, but once there is a problem in the guard, the huge military salary will deplete the country's revenue.

In terms of the guard system itself, it is stronger than the government military system, first of all, there is no trouble of self-respect for the army, and secondly, the control of the border areas is stronger than that of the Tang Dynasty, but because the burden of soldiers is heavier, there are many deserters, and the output of the guard tuntian will inevitably be unstable. Moreover, the guard is hereditary, and the hereditary thing is actually very unreliable, Lao Tzu can fight, but his son may not be able to fight, so the combat effectiveness of the guard is bound to decline gradually. And the hereditary lineage of this guard reminded Zhu Yunwen of the serfdom of Tusi, the army is an organization with strict upper and lower levels, if soldiers are controlled by officers anytime and anywhere, then what is the difference between them and slaves? Thinking of this, Zhu Yunwen couldn't help but shudder, I'm afraid that the guard collapsed for this reason.

Zhu Yunwen combined with the twists and turns of the military department, and felt that the guard was bound to be reformed, and the guard created the glory of the Ming Dynasty, and completed the unification of the empire and the post-war reconstruction in the case of a sparse population, but with the development of society and the corruption of the officials, problems will inevitably arise, and what he needs to do is to do it gradually, first improve the life of military households, and then gradually abolish the guard. But it's not suitable to do this at this time, you have to solve Zhu Di.

Zhu Yunwen also remembered a problem, the military household system relatively reduced the autonomy of soldiers, and the power of officers increased relatively, which would lead to the flight and slavery of soldiers, and also lead to the corruption and degeneration of officers, so in the late Ming Dynasty, the quality of officers declined rapidly, and they were looked down upon by civilian officials and played between applause.