Look at the territory map of the Qin Dynasty and answer the question: Please answer: (1) When was the Qin Dynasty?

Land area of Qin Dynasty: 3,546,900 square kilometers.

Qin Dynasty-China was the largest and most unified multi-ethnic country in Asia at that time. In this vast land, there are more than 20 million people of all ethnic groups living.

In 22 1 year BC, Qin Shihuang unified the six countries. After many expansions, Qin Shihuang reached 2 10/year BC.

At the time of his death, the territory of the Qin Dynasty reached an unprecedented scope. The territory of the Qin dynasty includes the old places of the seven countries at the end of the Warring States period.

All of them are, but some of them were newly seized from other nationalities.

From about 222 BC to 22 BC1year, after Qin Jun pacified Chu, the hometown of Jiangnan and Yue, it was

Enter the southern part of Zhejiang, conquer the local Vietnamese regime, and set up Minzhong County to Yexian County (now

Fuzhou is the county government. The control points in the Qin Dynasty were obviously quite few, so there was nothing in such a vast area.

Yaozhi county, and after the death of Qin, the whole territory of central Fujian was once again owned by the Vietnamese.

The territory of Xinjiang in the Qin Dynasty included Lingnan area, which is the northeast of Guangdong, Guangxi and Vietnam south of Nanling today.

The settlement of Baiyue nationality in the Warring States period was not the territory of Chu State. According to the record of Huai Nan Zi Ren Xun,

Qin Shihuang's motivation was that "Li Yue's rhinoceros horn is like a jade bead with teeth", so he ordered commander Tu Youyou to lead a 500,000-strong army into five parts.

Lunan sign. Due to the heroic resistance of Vietnamese relying on the jungle, Qin Jun suffered hundreds of thousands of casualties in three years, even the commander Du Sui.

Killed in a night raid in Vietnam. So it was not until the thirty-third year of Qin Shihuang (2 14 BC) that he "tasted the dead,

In the same year, Guilin, Nanhai and Xiang Jun counties were established, basically ending military operations. protect

Wei Tuo of Lingnan asked Qin Shihuang to send 30,000 unmarried women as spouses of soldiers, but only 15,000 were obtained.

Thousands of people.

In the southwest, the Qin Dynasty took Chengdu Plain as its base and expanded westward and northward to the north of Dadu River.

The upper reaches of Minjiang River occupy the tribal areas such as Qiong, Yan, Ran and Yan. Another "Wuchi Road" was opened to the south.

From Yibin, Sichuan to Qujing, Yunnan, many strongholds were controlled and some administrative agencies were set up along the route.

However, due to the limited troops and personnel stationed, the rule was not consolidated, so it was released after Qin's death.

Abandoned in the northwest, in the thirty-second year (2 15), Qin Shihuang sent Meng Tian to expel Hetao I with 300,000 troops.

In the second year, Jiuyuan County was established at the southern foot of Yinshan Mountain and east of the Yellow River, and 34 newly established counties (one) were under its jurisdiction.

For example, 44 counties. But these places were originally the former sites of Zhao during the Warring States Period, and even the Wan Li built by Qin Shihuang for Meng Tian was a dragon.

This city is actually based on the Great Wall built by Qin, Zhao and Yan during the Warring States Period. Because Huns are tourists.

Herdsmen invaded the mainland from time to time in the past, and the measures taken by the Qin Dynasty were mainly for military defense purposes.

The total population of Qin Shihuang was between 20 million and 30 million, but after a long war at the end of the Warring States period.

After that, the population dropped sharply, so there was a general shortage of labor at that time.

Not population pressure. Because of this, Qin Shihuang had to recruit people for labor and military service on a large scale.

With cruel coercive measures, it has become stretched, such as not sending more troops to South Vietnam.

Aid and supply, after the establishment of the New Deal, no more immigrants can move in. After the death of Qin and the early years of the Western Han Dynasty, Qin

The new territory was completely lost, and the southwest and south were all recaptured by local ethnic groups, or a de facto independent government was established.

Yes, an important reason is that there were too few troops, administrators and immigrants in the Qin Dynasty. in the middle of

South Vietnam, where the original immigrant group seized power, had to rely on local tribal leaders and follow the customs of the Yue nationality. surname

Some North Koreans migrated from Shandong Peninsula and southeast coastal areas to Korean Peninsula and Japanese archipelago, but most of them.

It was to escape the rule of the Qin Dynasty, or it was a continuation of the long-term tradition of marine migration, and it was not a person who moved out.

The result of too many mouths.