US Navy veteran Lauren DePina approaches horses with a halter over her shoulder to begin working on equine rehabilitation techniques at Project ComeBack in Holliston, Mass. on July 28, 2022. "People don't understand us as veterans... It's like a fresh slate, they (the horses) don't know us," says DePina.

US Army veterans Derek Stirk (left) and Adam Costello (right) head out to the field to begin working with their respective horses at Project ComeBack in Holliston, Mass. on July 28, 2022.

Rescued horses at Project ComeBack drink from a stock tank awaiting their veteran partners to arrive in Holliston, Mass. on July 21, 2022. During the six-week program, veterans hear the back stories of each horse, often ones of trauma and neglect, and choose a horse based on the story that relates to them most

A grenade is tattooed on the arm of Derek Stirk, one of the veterans taking part in the six-week course at Project ComeBack in Holliston, Mass. on August 3, 2022. " It (service) was part of my life, but it's not what defines who I am now," says Stirk.

Lindsay Andon, the Founder and Executive Director of Project ComeBack, and Lauren DePina go over techniques for working in the round pen at Project ComeBack in Holliston, Mass. on August 10, 2022. The round pen allows the horses to work on healing without feeling isolated as they are still in sight of their herd.

Lindsay Andon, the Founder and Executive Director of Project ComeBack, leads veterans in a sit-down class on managing different equine personalities and how to approach each veteran’s specific horse at Project ComeBack in Holliston, Mass. on July 28, 2022.

Veterans take part in a yoga class taught by Judy Thapa before they begin working with their horses at Project ComeBack in Holliston, Mass. on August 3, 2022. The classes guide the veterans through meditation and different poses to help with self-healing.

US Marines veteran Theresa Hughes bonds with her horse Kai, an American mustang found in a kill lot in Texas, after weeks of difficulty approaching the horse at Project ComeBack in Holliston, Mass. on August 10, 2022.

US Army Space Command veteran Scott Cousland scratches MoonShadow, a horse that was rescued from a kill pen in Oklahoma, as she walks up to him at Project ComeBack in Holliston, Mass. on July 20, 2022. "I thought I had good bonding... ultimately everybody wants to be understood, but it's really painful to face the reality of the horses," says Cousland.

Scott Cousland walks Percy to the circle pen in the final class of the beginner program at Project ComeBack in Holliston, Mass. on August 10, 2022. Cousland has partaken in multiple forms of trauma therapy but found working with the horses at Project ComeBack one of the most effective.