40 Years after a Purple Heart in Vietnam a Veteran Hikes on the Appalachian Trail - YouTube Mark Parish·Published on Dec 13, 2013 A wounded Veterans odyssey 40 years after receiving the Purple Heart in the Vietnam war. Vietnam war Veteran Mark Parish hikes the Appalachian Trail for rehabilitation from delayed stress syndrome. Through this video you willlearn how Mark earned his Purple Heart, learn about his experiences in Vietnam, see some beautiful scenery from the Appalachian Trail and see Marks ending journey to the Vietnam Veterans Memorial Wall in Washington DC.