The regiment brought 106 men to the field in three companies: D, G and H.
From the monument:
Army of the Potomac
Second Division, Second Brigade
Tenth U.S. Infantry
Captain William Clinton commanding
July 2 Arrived with the Brigade in the morning and took position on the right of the Twelfth Corps. Later moved to the left and at 6 p.m. the Brigade form ed line with left on north slope of Little Round Top the right extending into the woods. Advanced across Plum Run and to the crest of the rocky wooded hill in front near the Wheatfield and facing left occupied the stone wall on the edge of the woods. The Confederates having opened fire on the right flank and advanced through the Wheatfield in the rear the Brigade was withdrawn under a heavy infantry fire on both flanks and from the rear and shot and shell from the batteries and was formed in line on the right of Little Round Top.
July 3 Remained in same position.
Casualties: killed 1 officer and 15 men; wounded 5 officers and 27 men; missing 3 men
See more on the 10th United States Infantry in the Civil War