Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  N'agbanyeghi na United States maara banyere ebe nchekwa PAVN / Viet Cong na Cambodia kemgbe 1966, Onye isi ala Lyndon B. Johnson ahọrọla ịwakpo ha n'ihi nsonaazụ mba ụwa nwere ike na nkwenye ya na enwere ike ime ka Sihanouk gbanwee usoro ya. Otú ọ dị, Johnson nyere ikike ka ndị ọrụ nyocha nke ndị agha na-enyere ndị agha aka, Vietnam Studies and Observations Group (SOG) banye Cambodia ma kpokọta ozi na mpaghara Base na 1967. Nhọpụta a họpụtara Richard M. Nixon n'afọ 1968 na iwebata iwu ya nke ịdọrọ US nke nta nke nta site na South Vietnam na Vietnam nke esemokwu ahụ ebe ahụ, gbanwere ihe nile.  Ajụjụ: Olee mgbe a họpụtara Nixon?
Afọ 1968