My reading of the Vietnam War changed my view of the "MOVIE" steriotyping of the land scape.
There were high lofty mountains, desert like dunes and scrub on some coast lines, to the swampy delta areas - and about anything you could imagine in between.
My son that served in IRAQ, a place we all think of as a desert environment, told me of a helo assault to an island in (I believe) the Tigres river that was thick jungle and palm trees. He said they couldn't see ten feet in some places!
"We were solider's once" is a great movie about a horrible battle. One of the most sobering accounts of which is that told by Mr. Jack P. Smith.
http://www.mishalov.com/death_ia_drang_valley.html