Vietnam once had very close relations with our country, during the Vietnam War, our country carried out a lot of assistance to Vietnam, it can even be said that it would rather eat less and more to aid Vietnam, at that time China dispatched more than 100,000 people to resist the United States and aid Vietnam "support troops", it can be said that without our assistance Vietnam can not win the Vietnam War is still a problem. However, after reunification, Vietnam did not take the past kindness to heart, but on the contrary, with the support and instigation of the Soviet Union, completely disregarded the assistance that our country had provided to it during the Vietnam War, and brazenly violated our borders. So why did the Soviet Union, the big brother who instigated Vietnam to send troops, did not dare to send troops to aid Vietnam during the war of self-defense and counterattack against Vietnam?
Before the war, Vietnam's military leaders were immersed in the dream of the Vietnamese army's "invincibility" and believed that our army was vulnerable. However, at the beginning of the war, the offensive of our army defeated the Vietnamese army one after another, and the north could not be found. So Vietnam also immediately asked the big brother Soviet Union for help, hoping that the Soviet Union would send troops to help them, but until the end of the war, they did not see the figure of Soviet soldiers.
At that time, although the deterioration of China's relations with the Soviet Union was very serious, the relations between China and the United States had improved considerably, and the two countries had also officially begun to establish diplomatic relations, which also made the Soviet Union have a certain degree of jealousy. Moreover, the reason why our country is waging this war is also because defending the country is a just battle of self-defense.
And the Soviet Union also has another important reason not to dare to send troops to help Vietnam, Vietnam's former senior official Nguyen Jiantong also said this reason, it turned out that Vietnam was too small to look at the military strength of our People's Liberation Army, at the beginning of the troops did not ask the Soviet Union for assistance, but saw that our army's offensive was unstoppable, only to ask the Soviet Union for assistance, the Soviet Union then only sent military advisers forward, and did not take too much action, and our army also withdrew after occupying Lang Shan, and the Soviet Union had no reason to send troops to us.