Embarked on transport "Star of the South" April 23, 1861. Arrived at Washington, D.C., April 29. Mustered in May 10, 1861. Advance into Virginia and occupation of Arlington Heights May 24. Skirmish near Chain Bridge June 2. Engaged in picket and fatigue duty, constructing Fort Bennett, and a redoubt near Aqueduct Bridge; also guarding bridge at Georgetown during battle of Bull Run. Mustered out August 5, 1861.