Early on the morning of March 17, 1863, Averell's advance guard reached Kelly's Ford on the Rappahannock and found that felled trees and 60 Confederate sharpshooters opposed their crossing. Three attempts to cross were repulsed under heavy fire, delaying the Union advance by over 90 minutes. Averell's chief of staff, Major Samuel E. Chamberlain, eventually forced a crossing led by 20 men of the 1st Rhode Island Cavalry. Chamberlain was wounded in the head. Despite the minor casualties in this action, Averell proceeded cautiously, taking over two hours to cross his men over the swiftly running river.