Da Nang is a popular stop for tourists visiting Vietnam, I had a ticket to go there late last year but the weather was terrible in January (rain every day) and I was just getting over a respiratory infection about the same time my flight was scheduled to depart Bangkok. Trying to reschedule the flight on VietJet ended up being impossible as they made little attempt to respond to my inquiries and it is quite possible no one spoke English. It is also possible they saw my nationality and just chose to ignore me.
It's a beautiful country, I visited Ho Chi Minh City and look forward to seeing Da Nang on my next trip to SEA. I certainly am grateful I was never sent there as an occupier. I worked with many Vietnam veterans over the years and they did not say much about their actual time over there. It was a terrible war that should have never been fought, and ended in 1975 after being occupied since 1887 by French, and later American, colonizers.