First Army Corps.
Maj. Gen. Joseph Hooker, Commanding.
September 16, 1862.
The First Army Corps moved from its bivouac near Keedysville at 2 p.m. on Sept 16. Doubleday's Division crossed the Antietam at Pry's Ford; Rickett's and Meade's Divisions at the upper bridge.
The divisions advanced in parallel columns, in a westerly direction, until 6 p.m., when Meade's Division encountered the enemy near the East Woods.
The corps was then formed in line of battle, facing south and south-west, Meade's Division in the center, somewhat advanced. Doubleday's Division on the right and Ricketts' Division on the left in supporting distance.
The fighting ceased on account of darkness at about 6:30 p.m.