I know, note my "after the French defeat."Jovial Monk wrote:This was before all that, late WWII in fact.
Now one could argue that the French should have never been supported in Vietnam post WW2, Truman did because he believed Europe was more important, and that the Communists would win France if the right in France were not politically supported, their demand being a continuation of French holdings in Vietnam.
So Truman was seeking to hold the more important country.
The OSS was impressed with the way the Communists opposed the Japanese, they may have won the policy argument POST the French defeat had the Communists showed any tolerance for plural politics once they defeated the French, but the Communists did not, making support for a unified state under them impossible.