Ralph Gene Williams died at the age of 19 on June 9, 1966 in Quang Nam provence.  He was born February 14, 1947.  From Hines in Harney County, he can be found on panel 8E, line 29. You can read remembrances at https://www.vvmf.org/Wall-of-Faces/56396/RALPH-G-WILLIAMS/.  He would be 73 now.