Some of the best stress physiology research has been done with the military. When our men and women in uniform answer the call to serve, they face incredible challenges. Some of them struggle with stress-induced issues, but most are changed in ways that promote health. We know a great deal about the factors that are associated with that type of resilience, but little is known about how to modify those factors. During my post-doc I had the honor of helping conduct a large randomized controlled trial to enhance resilience. By training the Marines interoceptive system, we were able to improve brain health.