 Nyora kupfuurira kweiyi ndima - Mukati mokukombwa kweKhe Sanh, United States yakaita nhamburiko huru yokugoverazve nhare yeU.S. Marine yakamira imomo. Zvisinei, nemhaka yokurwiswa nePAVN nepfuti, kumhara panhandare yendege yeKhe Sanh kwakava basa rine ngozi. Gadziriro yokuendesa yeGPES yakabvisa kudikanwa kwokudonha kwendege nokudaro ichideredza zvikuru kuratidzirwa kunhare dzezvombo. GPES pamwe chete neLAPES delivery system zvose zvakashandiswa paKhe Sanh, kunyange zvazvo nzira yokutanga yaionekwa seyakakodzera zvikuru mumamiriro ezvinhu paKhe Sanh. Nzira mbiri dzokuendesa dzaiva nengozi uye dzaida kuti vashandi vacho vave nounyanzvi uye vadzidziswe. Kuendesa kusina kururama kunogona kuguma nekukuvadzwa kwemutoro, zvivako zvepasi uye kunyange kukuvadzwa kana rufu kuvose vari vaviri vashandi vepamhepo nevashandi vepasi. Pashure peHondo yeVietnam, GPES yakabviswa zvishoma nezvishoma ichitsigira LAPES, iyo yakava hurongwa hwekutumira hurongwa hweHondo. 