Flag in the Nguyễn dynasty, 1920�?945 Immediately after Vietnam missing Gia Định, the island of Poulo Condor, and 3 southern provinces to France Along with the Treaty of Saigon amongst the Nguyễn dynasty and France in 1862, a lot of resistance movements within the south refused to recognize the treaty https://vitnam79001.ageeksblog.com/30193959/a-review-of-việt-nam