This link gives you lots of information concerning command chronologies of military units [all services] having operated in Vietnam.
Not all of the information is accurate in the sense of how it was originally scanned. For example, if one looks up the 1-31 May 1968 Command Chronology for the 2nd Battalion, 4th Marines, the day to day information presented is that of 1-30 June 1968. All in all, however, this is an interesting look into the Vietnam War.
MSgt Raymond Backstrom, the author of this endeavor, replied with the following to me upon my request to him for permission to put the link on our web site.
“Feel free to add it where appropriate and pass it on as far and wide as you can. Unfortunately, it is as accurate as it will probably be. All the scanning was done at Quantico years ago, and the original documents have been passed on to National Archives. I would think it is only a scanning error, and the missing pages would be at NARA. They scanned over a million pages of documents, and while they are good for the technology at the time, there is still a lot of information not readable in some of the documents.”
MSgt Backstrom will also put our web site at the top of the 2/4 page. This may garner us some of our lost Marines and corpsmen.