The Pinkertons were also used as guards in coal, iron, and lumber disputes in Illinois, Michigan, New York and Pennsylvania, as well as the Great Railroad Strike of 1877.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: The Pinkertons were also used as guards in coal, iron, and lumber disputes in Illinois, Michigan, New York and Pennsylvania, as well as the Great Railroad Strike of 1877. ### Response: .