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.
In A Nutshell... The Vietnam Warâcommonly referred to as America's longest warâgrew out of the American commitment to the containment of communism during the Cold War. For approximately fifteen years, the Democratic Republic of Vietnam (North Vietnam) fought against an American-supported Republic of Vietnam (South Vietnam). The war for the U.S. ended in 1973 with the withdrawal of American combat troops, and two years later, South Vietnamese forces surrendered to the North.