qqp question1: How did the USA lose the Vietnam War considering the North Vietnamese did not have a navy or air force? question2: The Sino-Indian War is noted for the non-deployment of the navy or air force by either the Chinese or Indian side. One can see how planes might have been of some limited use, but what exactly was either nation's navy supposed to do in a war fought  far inland and high in the mountains and on salt flats?