If last Americans died in Vietnam was in 1975, why does this website says casualties happened until 1998?

by Curiouslyafraidguy
Cathsaigh

Those are "war related deaths" not combat deaths, so someone dying after the war due to wounds or disease from the war would be in those figures.

According to the website 839 of the casualities were 1976-1998, and 10787 were non-hostile casualties, of which 1978 were due to illness or injury.