.

Hancock was now, nine P.M. of the 9th of May, across the left flank of
Lee's army, but separated from it, and also from the remainder of
Meade's army, by the Po River. But for the lateness of the hour and the
darkness of the night he would have attempted to cross the river again
at Wooden Bridge, thus bringing himself on the same side with both
friend and foe.

The Po at the points where Hancock's corps crossed runs nearly due east.
Just below his lower crossing--the troops crossed at three points--it
turns due south, and after passing under Wooden Bridge soon resumes a
more easterly direction. During the night this corps built three
bridges over the Po; but these were in rear.

The position assumed by Hancock's corps forced Lee to reinforce his left
during the night. Accordingly on the morning of the 10th, when Hancock
renewed his effort to get over the Po to his front, he found himself
confronted by some of Early's command, which had been brought from the
extreme right of the enemy during the night. He succeeded in effecting
a crossing with one brigade, however, but finding the enemy intrenched
in his front, no more were crossed.

Hancock reconnoitred his front on the morning of the 10th, with the view
of forcing a crossing, if it was found that an advantage could be
gained. The enemy was found strongly intrenched on the high ground
overlooking the river, and commanding the Wooden Bridge with artillery.
Anderson's left rested on the Po, where it turns south; therefore, for
Hancock to cross over--although it would bring him to the same side of
the stream with the rest of the army--would still farther isolate him
from it. The stream would have to be crossed twice in the face of the
enemy to unite with the main body. The idea of crossing was therefore
abandoned.

Lee had weakened the other parts of his line to meet this movement of
Hancock's, and I determined to take advantage of it. Accordingly in the
morning, orders were issued for an attack in the afternoon on the centre
by Warren's and Wright's corps, Hancock to command all the attacking
force. Two of his divisions were brought to the north side of the Po.
Gibbon was placed to the right of Warren, and Birney in his rear as a
reserve. Barlow's division was left south of the stream, and Mott of
the same corps was still to the left of Wright's corps. Burnside was
ordered to reconnoitre his front in force, and, if an opportunity
presented, to attack w