COL William Benedict Nolde, Menominee, MI on www.VirtualWall.org The Virtual Wall Vietnam...

The United States Army buried its last official casualty of the Vietnam War at Arlington National Cemetery with full military honors. He was 43 years old when he was killed-in-action on January 27, 1973, near An Loc when an artillery shell exploded just eleven hours before the truce began.

He was an advisor to the South Vietnam Army and while he was not the last American to die in Vietnam, his death was the last recorded before the cease fire, and thus earned the dubious honor of being the last of 45,941 Americans killed during the conflict.

As such, his funeral drew not only full military honors but considerably more brass than the funeral of a field-grade officer would normally command. Among 150 or so mourners were General Alexander Haig, the Army Vice Chief of Staff, and Lieutenant General Robert E. Coffin, who had been his Commanding Officer when he served in Italy before his Vietnam tour.

Buried on February 5, 1973 in Section 3 of Arlington National Cemetery.
http://www.arlingtoncemetery.net/wbnolde.htm
https://en.wikipedia.org/wiki/William_Nolde