THIRTEENTH REGIMENT HISTORY & ROSTERS
Pittsburgh Washington Infantry
PENNSYLVANIA VOLUNTEERS
4th Brigade—First Division—Patterson’s Corps
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Enrolled April 25th, 1861. ( 3 Month’s Service)
Under call of President Abraham Lincoln
Mustered Out August 6th, 1861, re-enlisted and numbered the
102nd Pennsylvania Volunteers


Only four of the officers—the Colonel, Adjutant and two Captains—members of the First Pennsylvania Regiment in the army of occupation in Mexico, had any previous military war experience. But the alacrity with which every order was obeyed and the ardent desire manifested by both officers and men to acquire a complete knowledge of their duties rendered the instruction both easy and pleasant. The result of the six weeks training at Camp Scott, though the weather during a considerable portion of the time was stormy, was most satisfactory.
On the 4th of June the regiment moved to Chambersburg and on the 11th to Camp Brady, south of the town, reporting to Colonel Dixon S. Miles, commanding the 4th Brigade, the 1st Division of Patterson’s Corps.
On the 14th, the column began to move, the 13th reaching Greencastle the same night. This was the first actual march under arms and full equipments. On the following day it was continued to Camp Riley, near Williamsport.
On Sunday, the 16th of June, the 13th was assigned to the advance of the column, and passing through Williamsport about noon—just as worshiping congregations were dismissed—forded the Potomac and were the first volunteers from the north to reach Virginia on this line. Advancing a few miles the division encamped in a position well selected for defense which was designated Camp Hitchcock. Remaining until the 18th, the command was ordered back to the Maryland shore; all the regulars belonging to the corps, with the cavalry and artillery, having been ordered to Washington. On the return march, the 13th was again assigned the post of honor, that of the rear guard of the column. Returning to the neighborhood of Williamsport, it encamped in a position to command the principal ford. Details were furnished chiefly from this regiment for fatigue duty in constructing a permanent field work or redan, for the use of Captain Doubleday’s Battery. When completed, three siege guns of heavy caliber were placed in position and their range tested by a shot from each, which, riccochetting on the hard turnpike on the opposite side of the river caused sundry rebel horsemen, who were intently watching the operations, to beat a hasty retreat. When Patterson’s army again advanced on the 2nd of July, 13th and the 8th Pennsylvania regiments were detailed to garrison Williamsport and to protect.