What private policing agency thwarted the alleged 'Baltimore Plot' to assassinate Abraham Lincoln?

• A. Pinkerton Detective Agency
• B. The Pinkerton Agency
• C. U.S. Marshals Service
• D. Pinkerton Security Group

Answer: (B)

Private security organizations can play decisive roles in protecting leaders and uncovering threats. In this instance, the Pinkerton Agency—the private detective organization led by Allan Pinkerton—was the one that uncovered the conspiracy to assassinate Lincoln as he traveled to his inauguration. Pinkerton operatives provided security for Lincoln’s journey, tracked the alleged plot, and helped safeguard the route, enabling Lincoln to reach Washington safely. The other options refer to a government law-enforcement body or modern firms that weren’t involved in this historical event, so they don’t fit the context of a private agency that thwarted the Baltimore Plot.