New Hope for PTSD Recovery

My Dad was a Purple Heart decorated army combat veteran of WWII. He never spoke of the war or his friend he kept in touch with who was the only other survivor of his company. The only evidence of his Post Traumatic Stress Disorder (PTSD) was whenever any of us in the household of three women raised their voice in conflict, he retreated to the back porch where he might stay for hours, long after the issue was over. I didn’t know about PTSD back then, but we speculated that his behavior was related to his experiences in the war.