【Key Words】international environment; resources; experience; aid
1. Introduction
As for the reason why the US fail to win the Vietnam war, there are still many disputes on this issue. In this paper, I will from the three aspects of the Vietnam, United States and the international environment to explain the root cause of failure of the United States during the Vietnam War.
2. The reason why the US fail to win the Vietnam war
2.1 The natural environment of Vietnam
It is generally believed that the natural environment is the key to win the war. Just as the saying goes:"Good timing, geographical convenience and good human relations; Favorable climatic, geographical and human …show more content…
Actually, according to the Lanchester model of guerrilla warfare[In 1916, during World War I, Frederick Lanchester devised a series of differential equations to demonstrate the power relationships between opposing forces. Among these are what is known as Lanchester's Linear Law (for ancient combat) and Lanchester's Square Law (for modern combat with long-range weapons such as firearms)] , in a battle, the regular troops need to be sent at least 8 times more than the guerrilla forces in order to win. But the United States can only send 6 times of the army. In this way, the odds of winning the United States is not large. If the American want to win and not pay a heavy casualties, the United States announced the withdrawal is the rational