Example image of eyePlorer eyePlorer map for 'Bureau of Military Information': American Civil War Intelligence agency United States Allan Pinkerton Pinkerton National Detective Agency Private investigator Scotland Security guard Train robbery Abraham Lincoln Baltimore Plot Department of the Ohio George B. McClellan Charles Pomeroy Stone Colonel Lafayette C. Baker Winfield Scott Confederate States of America Rail transport Major Union Army Army of the Potomac Joseph Hooker Major General George H. Sharpe Provost Marshal Prisoner of war Commanding General of the United States Army Richmond, Virginia Ulysses S. Grant Army of Northern Virginia Battle of Appomattox Court House Parole Office of Naval Intelligence Military Intelligence Corps (United States Army) Military Intelligence Division United States Army Intelligence and Security Command Abraham Lincoln assassination Andrew Johnson Edwin M. Stanton Europe Special agent United States Department of State President of the United States United States District Court for the Southern District of New York United States Marshals Service William M. Tweed BMI Dahlgren Affair Confederate Secret Service