Union Order of Battle at Chickasaw Bayou, Fourth Division

Commander, XIII Corps, Fourth Division, Major General Frederick Steele, Born in New York in 1819.

1st Brigade Brigadier Genera Francis Preston Blair Jr.	2nd Brigade Brigadier General Charles Edward Hovey	3rd Brigade Brigadier General John Milton Thayer	Unattached Units
1st Brigade Units 13th Illinois: Colonel John B. Wyman 29th Missouri: Colonel John S. Cavender 30th Missouri: Lieutenant Colonel Otto Schadt 31st Missouri: Colonel Thomas C. Fletcher 32nd Missouri: Colonel Francis H. Manter 58th Ohio: Lieutenant Colonel Peter Dister 4th Ohio Battery: Captain Louis Hoffman Company C, 10th Missouri Cavalry: Lieutenant Daniel W. Ballon	2nd Brigade Units 25th Iowa: Colonel George A. Stone 31st Iowa: Colonel William Smyth 3rd Missouri: Colonel Isaac F. Shepard 12th Missouri: Colonel Hugo Wangelin 17th Missouri: Colonel Francis Hassendeubel 76th Ohio: Colonel Charles Robert Woods 1st Missouri Horse Artillery: Captain Clemens Landgraeber Company F, 2nd Missouri Light Artillery: Captain Clemens Landgraeber	3rd Brigade Units 4th Iowa: Colonel James Alexander Williamson 9th Iowa: Lieutenant Colonel William H. Coyl 26th Iowa: Colonel Milo Smith 30th Iowa: Colonel Charles H. Abbott 34th Iowa: Colonel George W. Clark 1st Iowa Light Artillery: Captain Henry H. Griffiths	Unattached Units Battery A, 1st Illinois Light Artillery: Captain Peter P. Wood Battery B, 1st Illinois Light Artillery: Captain Samuel E. Barrett Battery H, 1st Illinois Light Artillery: Lieutenant Levi W. Hart 8th Ohio Light Artillery: Lieutenant James F. Putnam 3rd Illinois Cavalry: Colonel Lafayette McCrillis Thielman's Battalion (Illinois) 6th Missouri Cavalry: Colonel Clark Wright Patterson's Kentucky Engineers & Mechanics: Captain William F. Patterson