Final answer:
The Central Park Rangers' crowd control tactics are historically linked with enforcing 'law and order' during events such as the 1964 Harlem race riot, the 1968 Democratic National Convention 'police riot', and the Haymarket affair.
Step-by-step explanation:
The Central Park Rangers' crowd control tactics under investigation are not related to a specific concert but are associated with various historical events involving clashes and the enforcement of 'law and order' in different scenarios. Examples of such events in history include the race riot ignited in central Harlem on July 18th, 1964, following the death of a student and the resulting clash between African American teenagers and the police. Additionally, during the 1968 Democratic National Convention in Chicago, extensive force was used by the police and the National Guard against protesters in what was later dubbed as a 'police riot.' Also, another historical reference to 'law and order' and crowd control is the Haymarket affair, where a peaceful labor demonstration turned violent after a bomb was thrown at the police.