When she was 21 years old, Terry Farish spent a year in Vietnam supporting the U.S. Army 25th Infantry Division as a Donut Dollie. She firmly believes the experience shaped the course of her life. "I was recruited on my college campus near the primary helicopter training school in Denton, Texas. So many people I knew were deploying to Vietnam. I went there for a year — a year that would affect my entire life. One of the hardest times at the base was at the landing zone. The commanding officer said to us, ‘These men have just returned. Can you spend some time with them?’ We walked in, and they were all on cots. They were visibly traumatized. Some were awake, and some were not. We were told it would help them if we could just come through and say hello. I remember kneeling beside their cots, introducing myself and saying I was with the Red Cross. We would talk about what we missed back at home. If they weren’t able to do that, I would just sit with them for a while. I realized that...