The position of the Union army at 3 o’clock was as follows: In front, and on the ground where a most terrible battle was soon to be fought, was General Lee with Colonels Dudley and Lucas’s cavalry brigades with Nim’s battery of six guns and one section (two guns) of Battery G, Fifth United States regulars. United to this force there was now the Fourth division, Thirteenth army corps, with the Chicago Mercantile battery, (six guns.) Next, in the rear and completely blocking up the road, was General Lee’s train of some two hundred and fifty wagons, to the presence of which the subsequent disaster of the day is largely attributable. Back of these was the Third division, Thirteenth army corps, under General Cameron, moving up to the front as rapidly as possible. Next to the Third division was General Emory with the First division, Nineteenth army corps, seven miles from the extreme front, while General Smith was back of Pleasant Hill, one day’s march in the rear. The battle-ground was a large, open, irregular-shaped field, through about one-half of which on the right of the road a narrow belt of timber ran, encircling inward as it extended to the right until its base rested around upon the woods in the rear. The road passed through the centre of the field in a northwesterly direction toward Mansfield. Meandering diagonally through the field and across the road was a small creek or bayou, from the banks of which the ground rose gradually along the line of the road, terminating in a considerable ridge on each side. The ridge at the entrance to the field on the side of the advance was close up to the woods, and commanded the whole battle-field, while the ridge on the opposite side ran through the open field on the left to the belt of timber dividing the field on the right, along which it sloped gradually until it reached the level of the hollow on the bayou. The outer line of the field beyond the belt of timber on the right was an irregular semicircle, the extremities drawing inward, so as to correspond somewhat to the outline of the dividing wood. The outer line of the field on the left was very nearly at a right angle with the road. The rebel forces, occupying a front of about one mile, were stationed under cover of the woods along the further line of these fields. Their front, therefore, extended from their right flank in a straight line to the road, and then, following the shape of the field, circled inward until their left flank reached a point that would be intersected by a line drawn across the road at a right angle near the middle of the first field on the right. The main body of the rebels was evidently on the right of the roads. A battery was seen in position near the road, but it was not brought into action.