The Confederate Army of Manhattan

(Wikipedia) The Confederate Army of Manhattan was a group of eight Southern operatives who attempted to burn New York City on November 25, 1864, during the final stages of the American Civil War.
In a plot orchestrated by Jacob Thompson, the operatives infiltrated Union territory from Canada and made their way to New York. On Friday night, November 25, beginning around 8:45pm, the group attempted to simultaneously start fires in 19 hotels, a theater, and P.T. Barnum's museum. Continued

Photo: Library of Congress