"Secrets of the Civil War" is a four-disc set containing an in-depth look at significant, but not well-known, battles of the war, from Antietam to Shiloh to Gettysburg. Archival letters, original diary entries, cinematic reenactments and interviews with noted historians bring events that occurred over 140 years ago to vivid life. We learn that in the cavalry charge at Mine Creek, Kansas, it took only 30 minutes for 2,800 Union troops to defeat an enemy force more than double in size. Also covered is a Confederate raid on Vermont and an attempt by Union coal miners to blow up a Southern fort by tunneling underneath it. Nine separate programs from the History Channel are included.