Dec. 1862: Following the strategic Union win at Antietam, Federal forces clash with a massive Rebel army in the town of Fredericksburg, Virginia in what will become the largest engagement of soldiers in the Civil War. The Battle includes the first opposed river crossing and first urban warfare in American military history. Confederate Sergeant Richard Kirkland of the 2nd South Carolina Volunteer Infantry, known as "The Angel of Marye's Heights" for his compassion and bravery, provides water and comfort to wounded soldiers of both sides on the battlefield. Union 2nd Lieutenant John Adams of the 19th Massachusetts Infantry recovers both the regimental and U.S. colors under fire after the color bearers are killed; His Medal of Honor citation reads in part: "with a color in each hand advanced across the field to a point where the regiment was reformed on those colors."