This Question is about the Vietnam war

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The United States entered World War II as a strong opponent of imperialism , even when it involved allies. Yet, by 1950 , and certainly by 1954 the US supported French efforts to maintain control of IndoChina.

1. How and Why did Foreign Policy Change between 1945 - 1954 ?

2. Describe what international and domestic factors caused the US to view Ho Chi Minh , the French and the Word Diffrently.

3. Which US leaders were responsible for  these changes ?

4. Were these changes valid considering the overall world situation following World War II ?