The Pinkerton National Detective Agency is a private security and detective agency founded in 1850 by Allan Pinkerton in the United States. Initially established to provide investigative services, it became known for its work in solving crimes, protecting railroads, and providing security for high-profile clients. Throughout its history, the agency gained a reputation for its skilled detectives and innovative techniques. The Pinkerton Agency played a significant role in various historical events, including the pursuit of Jesse James and the protection of Abraham Lincoln during his presidency. Today, it operates as part of Securitas AB, focusing on security services.