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.
The Vietnam War was the longest war ever fought by the United States. It lasted more than 15 years, from 1959 to 1975. It was also the first war that the United States lost. WHY THE WAR WAS FOUGHT The United States entered the war to stop the spread of Communism in Southeast Asia.nitially the United States gained the territory of modern day Mexico from the Mexican American War (1846-1848) and the Gadsden Purchase of 1853, but it didn't officially become a state until 6 January 1912. The first Statehood Bill made it to the floor of the Congress in 1861 but failed to win apprâ¦.