Why did President Truman agree to help France regain control over Vietnam?

Related questions

• The most important reason why the USA withdrew from Vietnam was the Tet Offensive. How far do you agree?
• Why did Martin Luther King believe the Vietnam War was morally wrong?
• Was the Vietnam War an undeclared or declared war?
• What role did Australia play in the Vietnam War?
• Why did Americans support the Korean War but oppose the Vietnam War?
• Did the United States win or lose the Vietnam War?
• How did the United States become involved in the Vietnam War?
• What did the Tet Offensive show the American people?
• What U.S. wartime intelligence agency was assisted by the Vietminh?
• What was the role of the U.S. in the Vietnam Conflict?