Problem: One of the earliest pioneers of the field, known - The study of crisis intervention began during World War II in response to Group of answer choices soldiers returning from the war effort with (posttraumatic stress disorder) P T S D diagnoses. family reactions when loved ones left home to participate in war efforts. family reactions when soldiers returned from service and resumed their civilian lives. families grieving for loved ones who died in combat. as the Father of Crisis Intervention is Group of answer choices Sigmund Freud. Gerald Corey. Erich Lindemann. Reuben Hill. Need Assignment Help?