When the Civil War erupted, the Union and the Confederacy faced the challenge of organizing huge armies of volunteers with little or no military experience. Crucial to this task was finding generals, and Indiana answered this call with nearly 120 of them. Although a competent division and corps commander, Ambrose E. Burnside's leadership of the Army of the Potomac at Fredericksburg proved disastrous. Jefferson Columbus was a relentless commander, but murdering his superior in a Louisville hotel halted his probable rise to major general. As commander of the Louisville Legion, Lovell H. Rousseau was the only Civil War general commissioned by a city. Compiling years of research, historian Carl E. Kramer provides biographical sketches of every identifiable Indiana general who attained full-rank, brevet and state-service status in the tragic struggle.