越南战争是美国历史上输掉的一场重要战争。这场战争的失利引发了许多热烈的讨论。很多美国人原本对这场战争无比自信,因为他们拥有世界上最先进的科技,最精良的装备,最勇猛的军队。在越战中,美军大量使用了各种炸弹、炮弹、化学武器和以直升机为象征的最精良装备。与此相对,他们的对手北越军队最先 The Vietnam war was a major war lost in the history of the United States. The defeat of this war caused a great deal of heated discussion. Many Americans originally had great confidence in the war because they had the most advanced science and technology, the most sophisticated equipment and the most courageous army in the world. During the Vietnam War, the U.S. military made extensive use of various types of bombs, artillery shells, chemical weapons and the most sophisticated equipment symbolized by helicopters. In contrast, their rival North Vietnam Army first