STOP The WAR On VIET NAM protest pinback

STOP The WAR On VIET NAM, Viet nam For the Vietnamese S.P.U.
1.75 diameter Green version, S.P.U. = Student Peace Union
The S.P.U. emerged in 1959 on college campuses across the country and was more liberal than radical, After the Joseph McCarthy ­inspired dissolution of Communist and Socialist organizations on campuses the SPU became about the only option remaining for activists until the early to mid 60s when others took up the cause, the SPU faded away in 1964

Many of the early bottons used Viet Nam sometime around 1965 to 1968 most changed to Vietnam.