The 138th Pennsylvania Volunteers in Howard County Service at Relay House, 8/30/1862-6/16/1863. Company A at Dorsey's Switch, 4/20/1864-6/12/1864.\\ [[138th Pennsylvania Volunteers Primary Sources|Primary Sources]]\\ [[138th Pennsylvania Volunteers Secondary Sources|Archival and Secondary Sources]]\\ Bucks and Bedford County WIKIPEDIA - "The 138th Pennsylvania Infantry was organized at Harrisburg, Pennsylvania, and mustered in for a three-year enlistment on August 16, 1862, under the command of Colonel Charles L. K. Sumwalt. The regiment was attached to Relay House, Defenses of Baltimore, VIII Corps, Middle Department, to February 1863. 3rd Separate Brigade, VIII Corps, to June 1863. Elliott's Command, VIII Corps, to July 1863. 2nd Brigade, 3rd Division, III Corps, Army of the Potomac, to March 1864. 2nd Brigade, 3rd Division, VI Corps, Army of the Potomac and Army of the Shenandoah, to June 1865. The 138th Pennsylvania Infantry mustered out of service on June 23, 1865."