America, because Of ist wrong policy and its numerous mistakes,contributed much to the fall of Vietnam.The U.S was right when its wanted to become involved in the vietnam issue after the Geneva agreements to prevent vietnam from sliding under Communist control.However, American policy-makers made many mistakes in their methods of intervention in Vietnam. For example,after the fall if tge NgoDinh Diem regime,the U.S. government supported only the obedient generals whom they called "strong men" the Nguyen Van Thieu regime, which ead rejected by the Vietnamse peiple, survived for several years under U.S.support This support caused the southern Vietnamese to become dissatisfied and thus weakened the war against the Communists. didn't trust their own government; several meetings were held by the students who represented the people in request the resignation of the President. Unfortunately, he did resign,but not because of the request from his people; rather,he resigned because of the U.S. withdrawal of suppost. Later in the war,Americans made another big mistakes.First,they mobilized all of their forcrs to destroy the communist group attacking South Vietnam,yet later they nrgitiated with the Communists. Finally,Americans communitted themselves to "limited war" concept. Their troops in Vietnam did not seek victory on the battle field. This encouraged the stubborn Communists continue the war because in a game, if a player knows that he will or at least tie,he is not so stupid as to give up.