Complete the following sentence: The 37th Arkansas, now under the command of Maj Thomas H. Blacknall, due to Colonel Bell's capture at the Battle of Helena, subsequently served in the defense of Little Rock in September, 1863, with Fagan's Brigade. Union advance on Little Rock was opposed mainly by the Confederate cavalry divisions of Generals Marmaduke and Walker.<unk> Union advance on Little Rock was opposed mainly by the Confederate cavalry divisions of Generals Marmaduke and Walker. Confederate infantry brigades were dug in on the north side of the Arkansas River. According to Captain Ethan Allen Pinnell of the Eighth Missouri Infantry, "Our works extend from the [Arkansas] river two miles below the city. to the eastern part of Crystal Hill, a distance of 6 miles. Gen'l Fagan's Brig. is on the extreme right, Parson's on Fagan's left, Frost in the center and McRea's on the left". (General Fagan's Brig. is on the extreme right, Parson's on Fagan's left, Frost in the center and McRea's on the left.) Union forces established a pontoon bridge near Bayou Fourche, and crossed to the south side of the very low Arkansas River.<unk> Union forces established a pontoon bridge near Bayou Fourche, and crossed to the south side of the very low Arkansas River. <unk> <unk> <unk>
engagement at Bayou Fourche. Army of Price withdrew in the direction of Rockport.