The Pinkerton Agency, founded in 1850 by Allan Pinkerton, was one of the first private detective agencies in the United States. Initially established to provide security and investigative services, it gained fame for its role in tracking down criminals and protecting railroads. The agency became known for its innovative techniques and use of undercover agents. Throughout its history, the Pinkerton Agency played a significant role in various high-profile cases, including the pursuit of Jesse James and the protection of Abraham Lincoln. The agency's legacy continues today, influencing modern private security and investigative practices.