The consumate charactor actor, he also served in the U.S. Army in the European Theater of Operations in World War II, as a paratrooper with Company B, 1st Battalion 508th Parachute Infantry Regiment, 82nd Airborne Division.
From the 60s' Gunsmoke, To Kill a Mockingbird, and Twilight Zone to the 2000s' Raising Dead, Star Trek - New Voyages, and Yesterday's Dreams — Windom was a curmudgeon on screen and a delightfully sweet man when the cameras stopped rolling.
The New York Times reports:
Mr. Windom, who was also a tournament chess player, was married five times. Besides his wife of 37 years, Patricia, he is survived by four children, Rachel, Heather, Hope and Rebel; and four grandchildren.
Windom could never teach me a hedgehog move — I was a lost cause: 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. 0-0 Be7 7. d4 cxd4 8. Qxd4 d6 9. Rd1 a6 10. b3 Nbd7 11. e4 Qb8 12. Bb2 0-0 ... it was something like that...
You'll find William Windom's WWII service photo HERE