12th REGIMENT CAVALRY.
Dyer's Regimental History

from A Compendium of the War of the Rebellion, vol. III, Regimental Histories
by Frederick H. Dyer [1908]

Note: HTML format added to aid digestion.--if you remove the format you have Dyer's original text [He didn't use complete sentences].

12th REGIMENT CAVALRY.

• Companies "A," "B," "C," "D," "E" and "G" organized at Springfield, Ill., and
• mustered in February 24, 1862.
• Captain Gilmore's Company of Cavalry, Company "A," 32nd Illinois, organized at Camp Butler December 31, 1861; assigned as Company "F."
• Captain Sheerer's and Captain Barker's Companies, McClellan Dragoons, organized at Chicago, Ill., October, 1861; assigned as Company "H."
• Captain Brown's Company, McClellan Dragoons, organized at Chicago, Ill., October, 1861; assigned as Company "I."
• Companies "K," "L" and "M" organized at Springfield, Ill., December 30, 1863, to January 12, 1864.

• Duty at Camp Butler, Ill., guarding prisoners, till June, 1862.
• Ordered to Martinsburg, W. Va., June 20.
• Attached to District of Martinsburg W. Va., to September, 1862.
• 1st Brigade, 2nd Division, 12th Army Corps, Army Potomac, to October, 1862.
• Defences Upper Potomac, 8th Army Corps, Middle Dept. to February, 1863.
• 2nd Brigade, 3rd Division, Cavalry Corps, Army of the Potomac, to June, 1863.
• 1st Brigade, 1st Division, Cavalry Corps, Army Potomac, to November, 1863.
• Chicago, Ill., to February, 1864.
• District of St. Louis, Mo., Dept, of Missouri, to March, 1864.
• 1st Brigade, Cavalry Division, 19th Army Corps, Dept. of the Gulf, to June,1864.
• District of LaFourche, Dept. of the Gulf, to August. 1864.
• 4th Brigade, Cavalry Division Dept. of the Gulf, August, 1864.
• 3rd Brigade, Cavalry Division, Oept. of the Gulf, to February, 1865.
• 2nd Brigade Cavalry Division, District of West Tennessee, to July 1865.
• Dept. of Texas to May, 1866.

SERVICE.-

• Duty at Martinsburg, W. Va., and on the Upper Potomac to September, 1862.
• Near Martinsburg September 3.
• Bunker Hill September 3-4.
• Martinsburg September 6.
• Darkesville September 7.
• Williamsport, Md., September 11.
• Martinsburg September 11-12.
• Defence of Harper's Ferry, W. Va., September 13-14.
• Regiment cut way through enemy's lines on night of September 14.
• Antietam, Md., September 16-18.
• Hagerstown, Md., September 20.
• Duty on Upper Potomac September 20 to December 8.
  • Williamsport September 21
  • McCoy's or Russell's Ferry and near Green Springs Furnace October 10.
  • Reconnoissance from Bolivar Heights to Rippon, W. Va., November 9.
• Dumfries, Va., December 26-27.
• At Falmouth, Va., till April 1863.
• Chancellorsville Campaign April 27-May 8.
• Stoneman's Raid April 29-May 8.
  • Tunstall Station May 4.
  • Aylett's May 5.
• Raid from Yorktown into Matthews County May 19-23
• March to Falmouth, Va., Brandy Station and Beverly Ford June 9.
• Upperville June 21.
• Expedition from Yorktown to South Anna Bridge June 23-28 (Detachment).
  • South Anna Bridge June 26 (Detachment).
• Battle of Gettysburg, Pa., July 1-3.
• Williamsport, Md., July 6.
• Bronsboro July 8.
• Benevola or Beaver Creek July 9.
• At and near Funkstovvn July 10-13.
• Falling Waters July 14
• Chester Gap July 26.
• Kelly's Ford July 31-August 1.
• Brandy Station August 1-4.
• Near Fairfax Court House August 6 (Detachment).
• Brandy Station and Culpeper Court House September 7-8.
• Near Bristoe Station September 12.
• Advance from the Rappahannock to the Rapidan September 13-17
  • Culpeper Court House September 13.
  • Raccoon Ford September 14-16.
  • Stevensburg September 17.
• Reconnoissance across the Rappahannock September 21-23.
  • Jack's Shop, Madison Court House, September 22.
• Bristoe Campaign October 9-22.
• Raccoon and Morton's Fords October 10.
• Brandy Station October 11-12.
  • Oak Hill October 15.
• Rappahannock Station October 27.
• Moved to Chicago Ill., November 20-28, and
• duty there till February, 1864.
• Moved to St. Louis, Mo., February 9,
• thence moved to New Orleans, La., March 15-April 1.
• Moved to Red River April 20,
• arriving at Alexandria April 23.
• Actions at Alexandria April 28-May 8.
  • Bayou Teche, La., May 5-8.
• Wilson's Landing May 14.
• Avoyelle's or Marksville Prairie May 15.
• Mansura May 16.
• Yellow Bayou May 17.
• Morganza May 20.
• Arrived at New Orleans, La., June 1.
• Moved to Napoleonville June 11, and
• duty there till October, engaged in picketing and scouting.
  • Near Napoleonville July 29 (Co. "L").
  • Expedition from Paincoursville to Natchez, Miss., with
    • skirmish August 15-21 (Cos. "I," "L").
  • Expedition to Grand Lake, Grand River and Lake Natchez September 7-11.
  • Expedition from Napoleonville to Grand River and Bayou Pigeon September 26-30.
• Moved to Baton Rouge, La., and duty there till November 14.
• Liberty November 18.
• Davidson's Expedition against Mobile and Ohio R. R. November 27-December 13.
• Expedition from Baton Rouge to Clinton December 23-24.
• Moved to Vicksburg, Miss., thence to Memphis, Tenn., and to Gaines' Landing,
• Ark., January 7-26, 1865.
• Osban's Expedition through Southern Arkansas and Northern Louisiana January 27-February 14.
• Duty near Memphis, Tenn., till June.
• Expedition from Memphis, Tenn. into Northern Mississippi March 3-11.
• Moved to Alexandria, La., June 15-22,
• thence marched to Hempstead Texas, August 8-26.
• Duty in Eastern Texas till May 1866.
• Mustered out May 29, 1866.

Regiment lost during service

• 38 Enlisted men killed and mortally wounded and
• 4 Officers and 192 Enlisted men by disease.
• Total 234.

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