Thailand. (American Air Force Base in Khorat). 1966. Air Mail envelope endorsed 'SP6, Herbert M. Buhs, RA 16371910, USASCC - T, APO, SAN FRANCISCO, CALIFORNIA 96304' addressed to San Antonio bearing United States SG A1210, 8c carmine tied by 'Army & Air Force Postal Service/ A.P.O. (96223)' rubber date stamp '24th Feb 1966'.
During the Viet Nam war the Korat Royal Thai Air Force Base was a front line facility for the United States Air Force.