His organization, which later became part of the Union Bureau of Military Information, helped Dodge in short order defeat General John Bordenave Villepigue near the Hatchie River, capture Colonel W.W. Faulkner's command of partisan rangers near Island Number Ten and defeat General Earl Van Dorn at the Battle of Tuscumbia during his service with the Army of the Mississippi, and was later vital in the capture of Vicksburg under Grant. Dodge's network also led to the capture of Confederate spy Sam Davis, who was known as the "Nathan Hale of the Confederacy" and also as the "Boy Hero of the Confederacy." Efforts were led from his "war room" in Corinth, and one of the unit's major successes was the discovery and disruption of Coleman's Scouts, the elite secret service unit of rebel General Braxton Bragg.