There are hundreds of websites having to do with Vietnam and I have bookmarked many of them for myself. The following sites are but a few:
www.sampan.com/ This was the website of the late Gerry Schooler. He was a draftee veteran of the 25th Infantry Division -- Wolfhounds and was awarded the Silver Star. He arranged all my trips back to Vietnam. He became a great friend and we shared many incredible experiences on those trips back when he could come with me. Sadly, his time in Vietnam during the war exposed him to Agent Orange and he was diagnosed with Parkinson's.
Follow this link to a podcast in which Gerry talks about his time as a tunnel rat. He is the second interview.
http://www.angelfire.com/pa3/bravo1bn20vietnam/ this is a webpage by Bob Skwaryk that is about "Bravo Company 1st BN/20th INFANTRY at LZ LIZ, Duc Pho, and Mo Duc Viet Nam 1969-71. Declassified S2/S3 journals, maps and photos from the National Archives and unit personnel". A really great no frills site with plenty of information provided by the hard work and research of Bob Skwaryk including information on the WHITE CONG--see the Vietnam Journeys Diary section on Rumors, Lies, Legends, Facts and Fiction "White Cong".