Sun Setting in the West
It has been long called a geographical error at the end of the movie that the sun sets in the west - as people often say "Vietnam has no west coast."
This isn't exactly accurate. Southwest of Saigon (Ho Chi Minh City) there is part of Vietnam that is on the Gulf of Thailand and hence from there the sun would most certainly SET IN THE WEST.
Now, maybe there wasn't a military base there, but there could have been. It is just funny that even IMDB says "Vietnam has no west coast," when in fact it does.