<P> The role of the United States in the Vietnam War began after World War II and escalated into full commitment during the Vietnam War from 1955 to 1975 . The US involvement in South Vietnam stemmed from 20 long years worth of political and economic actions taken , which all had the common incentive to end the growing communist domination in Vietnam . President Harry S Truman provided progressively increasing amounts of financial and military assistance to French forces fighting in Vietnam . From the spring of 1950 , their involvement increased from just assisting French troops to providing direct military assistance to the associated states ( Vietnam , Laos , Cambodia ) . Eventually , US missions was carried out at a more constant rate by sending out increasing number of military assistance from the States . Their main intent was to not allow the Communist domination that was present in the government of Vietnam as there would soon be a chain of neighbouring countries that would follow . This would have resulted in a change in balance of power throughout Southeast Asia . Essentially , the US saw their major security interests being disturbed due to the rise of the communist expansion and strived to take any measure to end it . </P>
<P> The role of the United States in the Vietnam War began after World War II and escalated into full commitment during the Vietnam War from 1955 to 1975 . The US involvement in South Vietnam stemmed from 20 long years worth of political and economic actions taken , which all had the common incentive to end the growing communist domination in Vietnam . President Harry S Truman provided progressively increasing amounts of financial and military assistance to French forces fighting in Vietnam . From the spring of 1950 , their involvement increased from just assisting French troops to providing direct military assistance to the associated states ( Vietnam , Laos , Cambodia ) . Eventually , US missions was carried out at a more constant rate by sending out increasing number of military assistance from the States . Their main intent was to not allow the Communist domination that was present in the government of Vietnam as there would soon be a chain of neighbouring countries that would follow . This would have resulted in a change in balance of power throughout Southeast Asia . Essentially , the US saw their major security interests being disturbed due to the rise of the communist expansion and strived to take any measure to end it . </P>
when did the us enter the vietnam war start
when did the us enter the vietnam war start
1955
1955