france controll cambodia, laos and vietnam during world war II vietnam declaired their independence france didn't like this because they were using vietnam's natural resources the united states and france were allies so france asked the US for support to regain controll over vietnam the united states policy of containment was all about stopping the other countries from becoming communist even though hoe chi min wasn't really communist the US sent supplies and troops to vietnam to help france which shouldn't have happened NO! haha i ruined the whole thing -------comments------- history class is less boring than this.