original_query: What is the pursuit of Nazi collaborators and when did it take place?
query: What is the pursuit of Nazi collaborators and when did it take place?
answer: The pursuit of Nazi collaborators refers to the post-World War II apprehension of individuals who collaborated with the Nazi regime. This pursuit involved various methods, from organized hunts by specific groups to spontaneous retaliation by occupied populations.  It began immediately after World War II and continued for decades, with some trials occurring as late as the 1990s.