Which provision of the Geneva Accords was never realized?

Question

Quizplus · Accepted Answer

Although the Geneva Accords called for free elections in 1956 to unite the North and South of Vietnam, these elections were never held, leading to the eventual escalation of the Vietnam War. The other provisions, including the French withdrawal and establishment of a demarcation line, were realized at least in part. The partitioning of Vietnam into North and South was also initially established but ultimately proved unsustainable.

Which Provision of the Geneva Accords Was Never Realized