The request must be made in writing. Because the quality of the records can be poor, it is advisable to ask for rosters a few months before and after the actual month you are looking for.
Turnaround time can be very slow.
Plan on several months. Call and ask to speak with an Archivist specializing in the Vietnam War before going to the Archives. They can assist in determining whether materials you are interested in are available and explain how to obtain a researcher's card to examine the documents. Army Complete military and medical records, including DD-214s, can be obtained by veterans or their next of kin, if the veteran has died. Non relatives may also request this information, but what they will receive will be limited and will not include date of birth, official photo, records of court martial for active duty personnel, medical information, social security number, or present address.