For all the colonialism followed by civil war between the north and the south, which were on and off for 80 years untill 1975, Vietnam had a hard time recovering and not until 1990s that the country seems to be able to get back on track (still with limited resources at this point and trying to define its own version of a “Socialist country”) and started rolling ever since.
But, a friend of mine just pointed out an interesting insight which I found to make much sense, that every French colony stays poor and behind with their economic development, especially compared to the British colonies like Hongkong, Singapore, Australia, America? It’s probably due to the French’s policies of colonization at that point of time maybe.