Notes:

Notes / Abbreviations:
* – Missing in Action (MIA); Presumptive Finding of Death (PFoD); Body Not Recovered (BNR)
* * – Formerly Missing in Action; Remains recovered and positively identified
Acft Acdnt – Aircraft Accident
D. – Died
DC – Washington, D.C.
DiC – Died in Captivity
DoW – Died of Wounds
Jpn – Japan
KIA – Killed in Action
MoH – Medal of Honor recipient
MIA – Missing in Action
(n.c.) – Natural causes (i.e., died of natural causes (e.g., heart attack))
NVN – North Vietnam (communist)
Okw – Okinawa
PI – Philippines
POW – Prisoner of War
psth – Posthumous (e.g., promotion)
RVN – Republic of Vietnam (aka South Vietnam)
wds – Wounds

(1) – CPT Cramer, USMA class of 1946, was the 1st USMA graduate to die in Southeast Asia (SEA) during the Vietnam War; 21 Oct 1957
(2) – CPT Oliver, USMA class of 1969, was the 337th and last USMA graduate to die in Southeast Asia (SEA) during the Vietnam War; 3 Sep 1972

Total: 337 Sources: USMA Association of Graduates (AoG) REGISTER of Graduates and Former Cadets & Defense Prisoner of War/Missing Personnel Reference Document dated August 2009. DPMO in 2014 changed name to Defense POW/MIA Accounting Agency (DPAA). Web site at: http://www.dpaa.mil// This website is current and supersedes 2009 PMSEA.
Also, thanks to Ron Meier, USMA class of ’66 (ronmeier66@comcast.net), and Kevin Rue, USMA class of ’77, (forv59@gmail.com), for their work in compiling KIA names from the Vietnam Veterans Memorial (theWall). The West Point Association of Graduates lists 273 grads as KIA but this listing appears to be well short of actual combat losses in the Vietnam War. For Vietnam Memorial (The Wall) panel & row locations of all 337, contact Kevin Rue or Ron Meier.

Link to view details of the 337 KIAs: http://www.academybiznet.org/VietnamMemorial.html

Link to view Vietnam Memorial panel and row locations for each one of the 337 (search individually by name):
http://www.vvmf.org/Wall-of-Faces/

In addition, AOG might want to correct the rank/service of some personnel:

For some men initially listed as MIA, I used the date of the incident rather than the date of Presumed Death. These “presumed” dates of death and associated promotions could be tainted by political decisions. In some cases, the presumed date of death came 22 years after the MIA date. Sometimes there were two or more promotions while the man was carried in a MIA status. Inflated ranks, called “tombstone promotions,” look great on a memorial, but it confuses the issue as to the correct rank at time of death.