what year did the vietnam war happen?
1960s
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 The Vietnam War ( 1955 – 1975 ) was an important issue on college campuses across the United States in the 1960s and 1970s . As a belated response to Vietnam War protesters who believed that funding from the Defense Advanced Research Projects Agency ( DARPA ) made the university part of the military – industrial complex , the Stanford Research Institute split from Stanford University in 1970 . The organization subsequently changed its name from the Stanford Research Institute to SRI International in 1977 . 

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 The Vietnam War , was a conflict between the Democratic Republic of Vietnam ( DRVN , DRV or North Vietnam ) and the Republic of Vietnam ( RVN or South Vietnam ) , which eventually involved their respective allies . In 1959 , the United States sent military advisors to train the Army of the Republic of Vietnam . By 1965 , there were 25 @,@ 000 military advisors in South Vietnam and on March 8 , 1965 , the United States Marines became the first US combat troops to land in South Vietnam , with a force of 3 @,@ 500 . 

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 The war developed at a time when the attention of the United States and the world was on Iraq , and the Gulf War in 1991 , along with a sharp rise in oil prices and a slowdown in the growth of the world economy . 

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 The first crisis was the Mayaguez incident . In May 1975 , shortly after the fall of Saigon and the Khmer Rouge conquest of Cambodia , Cambodians seized the American merchant ship Mayaguez in international waters . Ford dispatched Marines to rescue the crew , but the Marines landed on the wrong island and met unexpectedly stiff resistance just as , unknown to the U.S. , the Mayaguez sailors were being released . In the operation , two military transport helicopters carrying the Marines for the assault operation were shot down , and 41 U.S. servicemen were killed and 50 wounded while approximately 60 Khmer Rouge soldiers were killed . Despite the American losses , the operation was seen as a success in the United States and Ford enjoyed an 11 @-@ point boost in his approval ratings in the aftermath . The Americans killed during the operation became the last to have their names inscribed on the Vietnam Veterans Memorial wall in Washington , D.C. 

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 One of Ford 's greatest challenges was dealing with the continued Vietnam War . American offensive operations against North Vietnam had ended with the Paris Peace Accords , signed on January 27 , 1973 . The accords declared a cease fire across both North and South Vietnam , and required the release of American prisoners of war . The agreement guaranteed the territorial integrity of Vietnam and , like the Geneva Conference of 1954 , called for national elections in the North and South . The Paris Peace Accords stipulated a sixty @-@ day period for the total withdrawal of U.S. forces . 
