shell shocked us marine - vietnam war

american anonymous anxiety armed army away background battle black camouflage combat combatant copy covered crying dark death depression destruction dirt disaster disorder distraught emotional face failure fatigue flak forces grief hands head helmet holding infantry jacket leadership man marine military mysterious pain pensive post problems ptsd rifle serviceman shadows shell shellshock shock shocked side sobbing soldier sorrow space stress suffering tearful traumatic troop uniform upset usa veteran vietnam view vintage vulnerability war weapon worried young