Linked from
The 14 pages that link to Battle of Dien Bien Phu, each with the reason it gives.
French IndochinaBroader topic: The defeat accelerated negotiations that ended French colonial rule.
First Indochina WarBroader topic: The defeat decisively weakened France’s position in negotiations.
Geneva AccordsBroader topic: The defeat decisively weakened France’s negotiating position at Geneva.
Indochina warsBroader topic: The defeat hastened France’s withdrawal and the First War’s settlement.
Raoul SalanBroader topic: The defeat came shortly after Salan’s tenure as commander in Indochina.