The presumption of herbicide exposure for veterans serving in Vietnam began in which year?

The presumption of herbicide exposure for veterans who served in Vietnam is established starting from 1962. This is significant because it marks the beginning of the extensive use of herbicides, including Agent Orange, by U.S. forces during the Vietnam War. Veterans who served in Vietnam during this period are presumed to have been exposed to these chemicals, providing them with certain benefits related to health issues arising from this exposure. This presumption was later formally recognized in legislation to aid veterans in accessing medical care and compensation for health problems associated with herbicide exposure.

The years mentioned in the other choices are not relevant to the initial establishment of this presumption. 1965 signifies an escalation of U.S. involvement in Vietnam but is not specifically tied to the herbicide exposure presumption. The year 1970 is important in terms of various legislative actions but does not mark the beginning of this presumption. Likewise, 1980 is much later than when the presumption was established and primarily relates to the further development of veterans' benefits.