English: Allan Pinkerton, President Abraham Lincoln, and Major General John A. McClernand. This photo was taken not long after the Civil War’s first battle on northern soil in Antietam, Maryland on October 3, 1862. Pinkerton was the head of Union Intelligence Services at the time. He also, allegedly, foiled an assassination attempt against Lincoln. His wartime work was critical in Pinkerton’s development, which he later used to pioneer the American private detective industry when he formed the Pinkerton National Detective Agency.
Español: Allan Pinkerton, el presidente Abraham Lincoln y el general de división John A. McClernand. Esta foto fue tomada no mucho después de la primera batalla de la Guerra Civil en tierras del norte en Antietam, Maryland, el 3 de octubre de 1862. Pinkerton era el jefe de los Servicios de Inteligencia de la Unión en ese momento. También, supuestamente, frustró un intento de asesinato contra Lincoln. Su trabajo en tiempos de guerra fue crítico en el desarrollo de Pinkerton, que luego utilizó para ser pionero en la industria de detectives privados de Estados Unidos cuando formó la Agencia Nacional de Detectives Pinkerton.
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Alternate version to: Image:PinkertonLincolnMcClernand.jpg == Summary == Allan Pinkerton, President Abraham Lincoln, and Major General John A. McClernand. This photo was taken not long after the Civil War’s first battle on northern soil in Antietam
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