[linMcHlp]

Could be born as late as 1958 - age 17, in the U.S. military and . . .

Vietnam Service Medal:

Service in geographical theater areas of Vietnam, Thailand, Laos, or Cambodia from 4 July 1965 through 28 March 1973 and the evacuation of Saigon (USN, USMC, and USAF) from 29–30 April 1975.

- - -

Definition of Vietnam Era

Section 2001 of the Act amended 38 U.S.C. 101(29)(A) by revising the definition of Vietnam era to

“[t]he period beginning November 1, 1955, and ending on May 7, 1975, in the case of a veteran who served in the Republic of Vietnam during that period.”

VA amends 38 CFR 3.2 to incorporate this change.

[Harmless Teddy Bear]

No, He couldn't because he died in 2020 when he was 68.

That means he was born in 1951 or 52. No later.

Unless what you are saying is that a Vietnam veteran in general could be born as late as 1958. Technically correct but highly unlikely.