My 5g-grandpappy (b1861ish) was a revolutionary POW, reenlisted when paroled by the brits, and lived to 1855 - so I’m unsure if it was the wear and tear or just the genes, but I’m proud to be a SAR (though not a member of the org).
My wife's geneaology hobby resulted in her discovering she is a direct descendant of a Revolutionary War veteran -- James Barham.
He lived to the age of 101, as I recall, and was thought to be the oldest living Revolutionary War veteran at the time.
He fought at Guilford C.H., the Battle of Petersburg and was present on the parade ground at Yorktown when Cornwallis surrendered to Washington.
In his later years, he lived in Ash Grove, MO and contingents from both the Union and the Confederacy visited his home and performed a 19-gun salute in his honor before proceeding to fight the Battle of Wilson's Creek near Springfield.
His grave, in the Mt. Pleasant Church cemetery, is a National Historic Site.
Quite a man.