The 199th Pennsylvania Infantry Regiment lost 2 officers and 30 enlisted men killed or mortally wounded and 52 enlisted men to disease during the Civil War.
|September and October||The regiment was organized at Philadelphia under the command of Colonel James C. Briscoe, Lieutenant Colonel Ambrose A. Lechler and Major William A. F. Gehr.|
|October||Moved to Deep Bottom Landing, Virginia. Duty in the trenches before Richmond, Virginia attached to 1st Brigade, 1st Division, 10th Army Corps, Army of the James|
|October 22||Lieutenant Colonel Letcher was discharged|
|November 28||Captain Robert P. Hughes of Company C was promoted to lieutenant colonel|
|December||Attached to 1st Brigade, 1st Division, 24th Army Corps|
|March 28-April 9||
|April 3-9||Pursuit of Lee|
Surrender of Lee and his army.
|April – May||Duty at Richmond, Va.|
|June 28||The 199th Pennsylvania Infantry Regiment was consolidated with the 188th Pennsylvania Infantry Regiment under the command of Colonel Briscoe|