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

First United States Sharpshooters--“Berdan's.”

153 killed == 10.9 per cent.

Total of killed and wounded, 546.

Present, also, at Big Bethel (1862); Williamsburg; Savage Station; South Mountain; Fredericksburg; Auburn; Po River; North Anna.

notes.--The unique regiment of the war. Berdan's Sharpshooters were United States troops, in which respect they were different from other volunteer regiments; each company, however, was furnished entire by some one State. In 1861, General Berdan received authority from the War Department to organize a regiment of skilled marksmen from companies to be recruited in various States, and in March, 1862, it was ordered to the Peninsula, where it was attached to the Fifth Corps. The men took an active part in the Siege of Yorktown, their target rifles and deadly aim rendering the enemy's batteries nearly useless. While there, the men were supplied with Sharp's rifles of an improved pattern and excellent finish, manufactured expressly for their use. In 1863 the regiment was transferred to the Third Corps, and thence, in 1864, to the Second. It distinguished itself at Chancellorsville, where its skirmishers captured the Twenty--third Georgia; its loss in that battle was 11 killed, 51 wounded, and 6 missing. At Gettysburg, Colonel Berdan with a detachment of his men, supported by the Third Maine, made the important and memorable reconnoissance on the morning of July 2d, which developed the movements of the enemy, but with a severe loss to the small number engaged. The regiment was also hotly engaged at Mine Run, where Lieutenant-Colonel Caspar Trepp, then in command, was killed.