the Union troops held the of the creek east of the bridge and fired north. On the other side of a curve in the creek, the Confederates held and fired south. Meanwhile, the 3rd Tennessee continued to advance, expecting that its left flank would be covered by the 50th Tennessee. With the latter unit not in position, the 3rd Tennessee's flank was exposed to fire from the 31st Illinois Infantry Regiment. Union troops counterattacked the 3rd Tennessee with four regiments and drove it back after a 45-minute fight, only to be staved off by the 41st Tennessee. The 20th Ohio also attacked the 7th Texas. The Confederate unit retreated and split in two, some falling back to the 1st Tennessee Battalion and the rest to the 10th and 30th Tennessee (Consolidated). More Union artillery arrived on the field when four 24-pounder howitzers from Battery D, 1st Illinois Light Artillery deployed. The battle was growing chaotic due to thick undergrowth and clouds of smoke, and units on both sides fought more and more individuals with less direction from high-ranking officers. At 13:30, a brigade from Union Brigadier General Marcellus M. Crocker's division, commanded by Colonel John B. Sanborn, arrived on the field and moved to support Logan's left flank. Two regiments from Crocker's division were also sent to aid Smith and Stevenson, as the 7th Texas was withdrawing. A Union regimental commander determined that the two new regiments were not needed, and the reinforcements took up a reserve position. The 50th Tennessee and the 10th and 30th Tennessee (Consolidated) prepared to advance together, but they paused to await further orders. The expected orders did not arrive, and the latter unit moved to the right, breaking contact between the two units. The men of the 50th Tennessee heard the sound of heavy fighting to their right, and they began to take fire from this direction. The unit then fell back to the position it had occupied in the morning. The 10th and 30th Tennessee (Consolidated), having either been ordered by Gregg towards the center of the line to shore up the exposed flank of the 3rd Tennessee, or been driven by Union troops towards that position, moved to a point in the line near where the 3rd Tennessee was fighting Smith's men. The new deployment left a gap between the 10th and 30th Tennessee (Consolidated) and the 41st Tennessee. Union breakthrough McPherson