What is the significance of the Battle of Dien Bien Phu?

The battle of Dien Bien Phu crippled the French in Vietnam. The French were fighting a loosing war there and this battle was the straw that broke the camel's back. The French got slaughtered at Dien Bien Phu and were soon out of Vietnam all together after this historic battle. Another thing I see with this battle is the French learned that when fighting different opponents their style of trench warfare would not work like it had in the First and Second World Wars. The Vietcong's hit and run tactics against a less mobile French force proved horrific for the French. The French learned that the war they were fighting could not be won. The French's style of warfare would not work in the jungles of Vietnam and the Vietcong used their knowledge of the land and the use of tunnels for supply and sneak attacks that the French could not prepare themselves for.