Why did China and Vietnam clash in the Sino-Vietnamese War in 1980s?

Vietnam invaded the Sino-Vietnamese border in the north and China's ally Cambodia in the south, posing a serious threat to the security around China. 1975, China began to expel Chinese crazily, which suppressed the normal life of overseas Chinese and led to the return of a large number of Vietnamese overseas Chinese. Stir up armed conflicts on the Sino-Vietnamese border, send armed personnel to invade across the border, hurt border people, tear down boundary markers, occupy the border, and cause events such as Punian Mountain and Tinghao Mountain.

Tearing up the Vietnamese government's statement in 1958 that dongsha islands, Xisha Islands, zhongsha islands and Nansha Islands belong to China, and occupying more than 96% of the islands of Nansha Islands in China in Southeast Asia, Vietnam embarked on the road of expansion, defeated the United States and won the support of the Soviet Union. Vietnam, equipped with Soviet-style American equipment, began to claim to be "the third military power in the world."

The Vietnamese * * * Production Party was formerly known as the Indian zhina * * * Production Party. 195 1 year, the Indochina peninsula * * * production party was established in Vietnam, Laos and Cambodia respectively. At this time, however, Vietnam proposed to establish an "Indo-zhina Federation" to unify the three countries. With the success of the Lao revolution and the pro-Vietnamese government, Vietnam invaded Cambodia in 1978 with the support of the Soviet Union, and quickly occupied the whole of Cambodia.

For China, Vietnam invaded the Sino-Vietnamese border in the north and China's ally Cambodia in the south, posing a serious threat to the security around China. At this time of China, the main pressure is still in the Taiwan Province Strait in the southeast and the Sino-Soviet border in the north. The broad masses of border residents and border guards are angry at Vietnam's increasingly anti-China treachery. In order to support Cambodia's anti-aggression struggle, Vietnam fell into an environment of fighting on both sides, and at the same time, in order to maintain border security. The Central Military Commission held a meeting on February 7 1978+65438, and issued a decision and order on the self-defense counterattack against Vietnam on February 8.

Extended data:

At that time, the world situation, first, the Cold War struggle between the United States and the Soviet Union broke out one after another. The landmark events were the withdrawal of the United States from the Indian zhina Peninsula and the Soviet Union's invasion of Afghanistan, and Su Xiu's upward momentum was aggressive; Second, China's weight shifted to the United States, which also voted for China, taking a clear attitude on the issue of Taiwan Province Province and supporting China's return to the United Nations. At the same time, Sino-Soviet relations are becoming more and more tense. The two countries have basically cut off contacts, and the Soviet Union still has a million troops stationed on the Sino-Soviet border. The situation is tense.

On the issue of India-Chile, the attitudes of the United States, the Soviet Union and China are very clear.

Soviet Union: Supporting Viet Nam to establish the Indo-zhina Federation, on the one hand, balancing China from the south, on the other hand, taking Indo-China Peninsula as a permanent foothold, expanding the cause of global hegemony.

The United States: It had to withdraw from the Indian zhina Peninsula, but it definitely didn't want the Soviet Union to fill this power vacuum. It hoped that China would intervene to balance the expansion of the Soviet Union. In fact, the United States has been preparing for this. 1974+ 10 After the naval battle in Xisha in June, China was able to control Xisha, and it was unimaginable without the acquiescence of the United States.

China: I definitely don't want another strong enemy around me. In any case, this "India-Chile Federation" must be strangled in the cradle.

Baidu Encyclopedia-Self-defense counterattack against Vietnam

People's Network-1979 Vietnam was almost completely divided by China in the Vietnam War.