When he did move it was done very deliberately, and on arriving at Gravelly Run he found the stream swollen from the recent rains so that he regarded it as not fordable.

Sheridan of course knew of his coming, and being impatient to get the troops up as soon as possible, sent orders to him to hasten.

He was also hastened or at least ordered to move up rapidly by General Meade.

He now felt that he could not cross that creek without bridges, and his orders were changed to move so as to strike the pursuing enemy in flank or get in their rear; but he was so late in getting up that Sheridan determined to move forward without him.

However, Ayres's division of Warren's corps reached him in time to be in the fight all day, most of the time separated from the remainder of the 5th corps and fighting directly under Sheridan.
Warren reported to Sheridan about 11 o'clock on the 1st, but the whole of his troops were not up so as to be much engaged until late in the afternoon.