The 8-cent Peace Corps commemorative postage stamp was placed on sale at Washington, DC, on February 11, 1972.
The Peace Corps origins date to a speech by Senator John F. Kennedy given at the University of Michigan. His speech urged students "to serve their country in the cause of peace by living and working in developing countries." As of today, the Peace Corps has sent more than 190,000 volunteers to 139 countries in response to President Kennedy's message.
Bradbury Thompson adapted the winning poster design by David Battle. The stamp was issued in sheets of fifty, with an initial printing of 135 million.
Postal Bulletin (January 6, 1972).
Peace Corps. "About the Peace Corps." http://www.peacecorps.gov/index.cfm?shell=learn.whatispc.