Fighting commenced against these relatively green troops, who were soon reinforced by the 1st Maryland Regiment and then David Birney's infantry division. The fighting lasted until about 9 p.m. and Lee, concerned that Ewell was risking a general engagement while separated from the main army, recalled his men. A number of them lost their way in the dark and were captured. The Confederates had lost over 900 men on a pointless skirmish that could have been assigned to a small cavalry detachment.