110th Pennsylvania Infantry Regiment  The 110th Pennsylvania Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War. The 110th Pennsylvania Infantry was organized at Harrisburg, Huntingdon, and Philadelphia, Pennsylvania, and mustered in August 19, 1861, for three years service under the command of Colonel William Delaware Lewis, Jr. The regiment was attached to Tyler's Brigade, Landers' Division, Army of the Potomac, to March 1862. 3rd Brigade, Shield's 2nd Division, Banks' V Corps and Department of the Shenandoah, to May 1862. 4th Brigade, Shield's Division, Department of the Rappahannock, to June 1862. 4th Brigade, 2nd Division, III Corps, Army of Virginia, to September 1862. 2nd Brigade, 3rd Division, III Corps, Army of the Potomac, to June 1863. 3rd Brigade, 1st Division, III Corps, to March 1864. 1st Brigade, 3rd Division, II Corps, to June, 1865. The 110th Pennsylvania Infantry mustered out June 28, 1865. Left Pennsylvania for Hancock, Md., January 2, 1862. Defense of Hancock January 5. At Cumberland and south branch of the Potomac guarding bridges of the Baltimore & Ohio Railroad until February 6. Moved to Paw Paw Tunnel and duty there until March 7, 1862. Advance on Winchester March 7–15. Reconnaissance to Strasburg March 18–21. Battle of First Kernstown March 23. Pursuit of Jackson up the Valley March 24-April 27. Occupation of Mt. Jackson April 17. March to Fredericksburg May 12–21, and to Front Royal May 25–30. Near Front Royal May 31. Port Republic June 9. Battle of Cedar Mountain August 9. Pope's Campaign in northern Virginia August 16-September 2. Fords of the Rappahannock August 21–23. Manassas August 23. Thoroughfare Gap August 28. Groveton August 29. Bull Run August 30. Duty at Arlington Heights, Defenses of Washington, Whipple's Command, until October. Moved to Pleasant Valley October 18, then to Warrenton and Falmouth, Va., October 24-November 19. Battle of Fredericksburg December 12–15. Burnside's 2nd Campaign, "Mud March," January 20–24, 1863. At Falmouth until April. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1–5.