Apparently, he was a rifleman for two days.
This story has become a fiasco. Nick Sandmann, the student captured in the video footage of Phillips beating his drum by the students, issued a statement clarifying what happened. Phillips felt like his narrative was stolen, whatever that means. Brick after brick of the original reporting from the anti-Trump opposition press has been refuted. Now, after the Vietnam veteran angle was blown up, we know a little more about his military service. Over at RedState, Jennifer Van Laar wrote about his DD-214 form that further refutes what he did while in the service. For starters, he was AWOL a lot working as a refrigerator repairman: