Many Swedes were active in protesting against the war, including, Olof Palme, who was to become prime minister. He marched in 1968, while he was Education Minister.
Sweden was also the first country to recognise what was then North Vietnam, in 1969.
And just a year later Stephen Goldin came here from the USA, because of his opposition to the war.
He told Radio Sweden why he made that decision.
Reporter: Nathalie Rothschild.