55th Regiment Massachusetts Volunteers, Colonel Alfred S. Hartwell.—Organized at Camp Meigs, Readville, Mass., May, 1863. Battles: James Island, May 21st, July 2d, 1864, February 10th, 1865, Honey Hill, Briggen Creek, St. Stephens, Deveaux Neck. Mustered out August, 1865.
56th Regiment, Colonel Charles Bentzoni, (regular army). Organized at St. Louis, Mo., August, 1863, as the 3d Regiment Arkansas Volunteers; changed to 56th Regiment U. S., March, 1854. Battles: Indian Bay, Meffleton Lodge, Wallace's Ferry. Mustered out September, 1866.
57th Regiment, Lieutenant-Colonel Silas Hunter.—Organized at Duvall's Bluff, Little Rock. Helena, Ark., December, 1863, as the 4th Regiment Arkansas Volunteers, changed to 57th Regiment U. S., March, 1864. Battles: Little Rock, April 26th and May 28th, 1864, Camden. Mustered out October, 1866.
58th Regiment, Colonel Simon M. Preston.—Organized at Natchez, Miss., August, 1863, as the 6th Regiment Mississippi Volunteers; changed to 58th Regiment U. S., March, 1864. Battle: Natchez. Mustered out April, 1866.
59th Regiment, Colonel Edward Bonton.—Organized at La Grange, Tenn., June, 1863, as the 1st Regiment Tennessee Volunteers; changed to 59th Regiment U. S., March, 1864. Battles: Brice's Cross Roads, Tupelo. Mustered out January, 1866.
60th Regiment, Colonel John G. Hudson.—Organized at Keokuk, Iowa, and Benton Barracks, Mo., October, 1863, as the 1st Regiment Iowa Volunteers; changed to 60th Regiment U. S., March, 1864. Battle: Big Creek. Mustered out October, 1865.
61st Regiment Lieutenant-Colonel John Foley.—Organized at La Grange, Tenn., June, 1863, as the 2nd Regiment Tennessee Volunteers; changed to 61st Regiment U. S., March, 1864. Battles: Moscow Station, Tupelo, Waterford, Memphis, Castport. Mustered out December, 1865.
62nd Regiment, Lieutenant-Colonel David Branson.—Organized at Benton Barracks, Mo., December, 1863, as the 1st Regiment Missouri Volunteers; changed to 62nd Regiment U. S., March, 1864. Battles: Glasgow, Palmetto Ranch. Mustered out March, 1866.
63rd Regiment, Major Wm. G. Sargent.—Organized at Memphis, and Island No. 10, Tenn., Vicksburg, Miss., and Goodrich's Landing, La., November, 1863, as the 9th Regiment Louisiana Volunteers; changed to 63rd Regiment U. S., March, 1864. Battles: Waterproof, Ashwood, Marengo. Mustered out January, 1866.
64th Regiment, Colonel Samuel Thomas.—Organized at Camp Holly Springs, Memphis, and Island No. 10, Tenn., December, 1863, as the 7th Regiment Louisiana Volunteers, changed to the 64th Regiment U. S., March, 1864. Battles; Ashwood Landing, Point Pleasant, Pine Bluff, David's Bend, June 2nd, 29th, 1864, Helena. Mustered out March, 1866.