The Ozone layer, which mostly lies on the lower portion of the stratosphere.
How Long Did The Vietnam War Last. The Vietnam War is the longest war ever to have taken place in the American history. It lasted for 16 years and it was terrible for the Americans at that time as the Civil Rights campaign was at its peak and so also the Vietnam War and anti war protests.
How Many People Died in the Vietnam War. October 3rd, 2010 46 Comments. The Vietnam war was a conflict that was fought for 20 years, from November 1st, 1955 until April 30th, 1975, when Saigon finally fell.