William F. Fox, Lt. Col. U. S. V., Regimental Losses in the American Civil War, 1861-1865: A Treatise on the extent and nature of the mortuary losses in the Union regiments, with full and exhaustive statistics compiled from the official records on file in the state military bureaus and at Washington

Eighty-Third Pennsylvania Infantry.

282 killed == 15.5 per cent.

Total of killed and wounded 071; died in Confederate prisons (previously included), 23.

Present, also, at Yorktown; Mechanicsville; Peach Orchard; Savage Station; White Oak Swamp; Glendale; Antietam; Shepherdstown Ford; Aldie; Rappahannock Station; Mine Run; Totopotomoy; Weldon Railroad; Hatcher's Run; Appomattox.

notes.--The Eighty-third encountered more fighting and lost more men in battle than any other Pennsylvania regiment; in fact, its loss in action was exceeded by only one other in the entire Union army. None of its losses were caused by blunders, none occurred in disastrous routs; its dead always lay with their faces to the enemy. With its “twin regiment,” the Forty-fourth New York, it was assigned to Butterfield's Brigade, Morell's Division, Fifth Corps. Colonel McLane was killed at Gaines's Mill, and Vincent fell at Gettysburg while in command of the brigade. At Gaines's Mill, the regiment lost 46 killed, 51 wounded, and 99 missing; four days later, at Malvern Hill, it lost 33 killed, 115 wounded, and 18 missing--a total of 362, out of the 554 present at Gaines's Mill. At Manassas, under Lieutenant-Colonel McCoy, it lost 14 killed, 72 wounded, and 11 missing, out of 224 officially reported by McCoy as present and engaged. It had the honor, at Gettysburg, of participating in the brilliant manoeuvre of its brigade — Vincent's — in seizing Little Round Top at a critical moment, helping materially to save the fortunes of the day. At Spotsylvania, its casualties amounted to 21 killed, 119 wounded, and 24 missing; total, 164. General McClellan once publicly pronounced the Eighty-third “one of the very best regiments in the army.”