What was the reason for America's defeat in Vietnam War?

The reason why the United States failed was because of the topography and climate of Vietnam.

You know, at that time, the United States was already the most powerful country. Although North Vietnam has received support from other countries, its combat capability is not strong. So why did the United States fail? In fact, this has something to do with the topography of Vietnam. The local climate in Vietnam is a tropical rainforest climate, where there are many forests and dense vegetation. Many American troops are mechanized, but in the forest, tanks and artillery can't get in at all You can only use the plane. However, due to the dense trees, the helicopters in the air can't see the Vietnamese troops in the forest, so they can only fly at low altitude, search for the Vietnamese troops, and then report to the ground forces.

Tanks and artillery cannot be used. Finally, only soldiers can enter. Although the American army was very strong at that time, they had little experience in the jungle. The tropical rain forest has a humid climate. At first, when American troops came to Vietnam, they felt very uncomfortable. Due to the weather, the combat effectiveness of the US military was greatly reduced. At that time, some people thought of setting fire to the forest and forcing the Vietnamese army out of the forest. Once the forest becomes a mountain, it can reflect the equipment advantage of the US military. But the plan was only implemented once or twice, and then the US military gave up. There are actually several reasons. First of all, Vietnam has a tropical rainforest climate. It rains all the year round, so the water content of trees is high. Sometimes, when the US military puts down the fuel bottle, it can only burn the top of the tree. The fire will go out automatically before it reaches the middle, which is one reason.

The second point is that the tropical rain forest climate often rains, and the burning bottle is damaged by rain before it rains. If it is not the rainy season, it is difficult to burn the forest. When the rainy season comes, the forest will still return to its original state. In addition, these burned trees have become nutrients, and the jungle has not only become less, but also become more lush. The third point is that the burning jungle is difficult to control. Once all the jungles are burned down, it will be difficult to put them out. In addition, the weather and wind direction must also be considered. American troops are also in the forest. Accidentally injuring friendly troops, if the United States has no intention of spreading to neighboring countries, it will face serious protests. These reasons led to the failure of the United States in Vietnam, but I think this failure is inevitable. After all, it is also an unjust war. After the war, the U.S. military also felt pain, and since then it has not rushed to send troops to attack Vietnam.