The main reason for the deterioration of relations between Vietnam and China is that Vietnam was ungrateful, completely forgetting China's assistance to Vietnam and who helped them drive the U.S. military out of their territory. After Vietnam experienced this battle with the United States, its ambitions were infinitely magnified, and with the continuous mobilization of support from the Soviet Union, Vietnam gradually became oblivious. In order to better curry favor with the Soviet Union and gain the support of the other side, Vietnam took the initiative to provoke China, and there was friction with the people in the border areas with China, and even threatened the lives and safety of the Chinese people for a time. Vietnam's repeated cross-border harassment has violated China's sovereignty, and China naturally cannot continue to tolerate it, so it has chosen to launch a counterattack against Vietnam.
It took China only a month to take Vietnam
When the Sino-Vietnamese War broke out, it took China only one month from the beginning of the attack on Vietnam to the declaration of victory in the war, which was unexpected by all countries. Many countries believe that the war between Vietnam and China is bound to be a protracted war, although the Vietnamese army does not have as many soldiers as China, but with the weapons left behind by the US military, the Vietnamese army still has a good chance of winning against the Chinese soldiers. However, the bravery shown by the Chinese soldiers did not occur to all countries, and Vietnam was beaten to lose the courage to fight, so when China announced the victorious withdrawal, the Vietnamese army did not take action to stop it.
Why did the countries that supportEd Vietnam collectively lose their voices?
What is strange is that when the Sino-Vietnamese War broke out, the countries that supported Vietnam at the beginning collectively lost their voices, and no country stood up to stop it, which still surprised many people. The most important thing is that in the process of fighting, the Vietnamese army has been clearly in a weak position, but these countries do not dare to send troops.
Vietnam had the courage to harass China and dare to fight with China, in large part because of the support of the Soviet Union, but from the beginning to the end of the war, the Soviet Union did not help, which made Vietnam gradually realize that it had become a pawn and tool in the hands of others. Therefore, when China announced the end of the war and withdrew, Vietnam had no intention of continuing to fight with China.
The Soviet Union could not pull itself out at all
The reason why the Soviet Union did not help Vietnam in the first place was not that they did not want to, but because they really could not pull away, because the relations between China and the United States had been eased and heated up at that time, so the Soviet Union was worried that if it sent troops to help Vietnam, the United States might also intervene. Once the Soviet Union intervenes, the United States chooses to throw an olive branch at China at this time, which can definitely play a very good effect. The Soviet Union and the United States are competitors, and naturally do not want to see Sino-US relations go any further. What's more, the Soviet Union will invest more troops in Vietnam, and its own strength will be damaged. Once the United States seized this opportunity to suppress the Soviet Union, it was not a good thing for the Soviet Union. And at that time, the United States did warn the Soviet Union not to meddle in the war between China and Vietnam, so the Soviet Union did not move in the end.
In addition to the Soviet Union, many other countries that support Vietnam are forced to support, although Vietnam's strength is not too strong, but compared with some countries in Southeast Asia, it is much stronger, so it had to support each other under the threat of the Soviet Union. However, when they see that China is enough to crush Vietnam, these countries are no longer panicked, but are happy to see Vietnam being suppressed and beaten by China, even if Vietnam settles the account afterwards, they can choose to seek China's asylum. Therefore, these countries have tacitly chosen to be spectators and have not sent troops to help Vietnam. Because even if they send troops to help Vietnam, they are not sure to confront China, and instead of taking such a risk, it is wisest to stand still and do nothing.