China's ancient national defense has a history of about 4,000 years, from the establishment of Xia Dynasty in 2nd1century BC to the outbreak of Opium War in 840/AD.
1, gradually rising stage: Spring and Autumn Period to Han Dynasty
During the Spring and Autumn Period and the Warring States Period, the vassal states fought for years, and the concept of national defense was rapidly strengthened. Formed the national defense construction ideas such as "enriching the people and building the country" and "soldiers involved in agriculture".
During the Han Dynasty, a relatively perfect military service system and national defense strategy were established, and many solid national defense projects were built, such as the city wall, the Great Wall of Wan Li and the Beijing-Hangzhou Canal.
2. The heyday of the Tang Dynasty
By the Tang Dynasty, the military service system was more perfect, and the national defense thought was more mature. The rulers attached importance to national defense and army building, which made China's territory expand, the surrounding area stable, and the people lived and worked in peace and contentment, and ushered in the heyday of national defense in China's history.
Armed forces system: Central Army: local army, border guards.
3. Declining stage: from Song Dynasty to late Ming and early Qing Dynasty.
The Song Dynasty was poor and weak, and national defense began to decline. In the late Qing Dynasty, China's national defense declined further.
Throughout the history of China's ancient national defense, when the ruling class rises, the politics is enlightened, the economy is prosperous, the military is strong, the national defense will be strong, and the domestic chaos will weaken and collapse.
Extended data
Enlightenment from the history of national defense
1, strong national defense is the basic condition for the survival and development of the country and the nation;
2. Correctly handling the relationship between national defense construction and economic construction is an important prerequisite for building a strong national defense;
3. Science and technology are the fundamental driving force for building a strong national defense;
4. The people are the source of strength for building a strong national defense;
5. Economic development is the foundation of a strong national defense;
6. Political enlightenment is the foundation of consolidating national defense;
7. National unity and national unity are the keys to a strong national defense.
Baidu encyclopedia-national defense
China Social Science Network-Overview of National Defense