Missouri Civil War Union Units 1st through 4th

The information in this list of Missouri Military Units comes from the Civil War Soldiers and Sailors web site (CWSS). This web site can also be searched by the name of a soldier.

-1st Units

 * 1st Battalion, Fremont Rangers, Missouri Home Guard (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Battalion, Cass County, Missouri Home Guard (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Battalion, Enrolled Missouri Millitia, 6 months (Union) Was enrolled 18 October 1861.


 * 1st Battalion, US Reserve Corps, Missouri Cavalry (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Battalion, Missouri State Militia Cavalry (Union) Organized at St. Charles, Missouri, March 26, 1862. Broken up November 11, 1862.


 * 1st Battery, Missouri State Militia Artillery (Union) Enrolled: 25 January 1862 through 4 April 1862 Mustered: 25 February 1862 through 3 Jun 1862 Discharged: 23 November 1862 Lieutenant Colonel: Arnold Krekel


 * 1st Division, US Reserve Corps, Missouri Home Guard (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Flying Battery, Missouri Light Artillery (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Northeast Regiment, Missouri Home Guard (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Northeast Cavalry Regiment, Missouri Home Guard (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Provisional Regiment, Enrolled Missouri Militia (Union) Organized between 17 March 1863 and 20 July 1863. Mustered out between 17 March 1863 and 20 July 1863. Discharged between 30 June 1863 and 3 February 1864.


 * 1st Regiment, Enrolled Militia, Missouri National Guard Infantry (Union) Called into service September 25, 1864, to repel Price's invasion of Missouri. Relieved from active service October 31, 1864. Action at Middle or Mill Creek Bridge July 24, 1864.


 * 1st Regiment, Enrolled Missouri Militia (Union) Enrolled August 11, 1862 and mustered in August 28, 1862, St. Louis, Missouri. Mustered out September 29, 1864 and discharged November 4, 1864.


 * 1st Regiment, Enrolled Missouri Militia Cavalry (Union) Enrolled: 1 August 1861 Mustered: 6 September 1861 Discharged: 1 September 1865 Colonel Calvin A. Ellis Colonel John J. Joslyn Colonel John F. Ritter


 * 1st Regiment, Missouri Cavalry (Union) Organized at Jefferson Barracks, Missouri, September 6, 1861. Regiment consolidated to 7 companies September 10, 1864. Served in various locations. With 7th Army Corps, to September, 1865.


 * 1st Regiment, Missouri Engineers (Union) Organized February 17, 1864, by consolidation of Bissell's Engineer Regiment of the West and 25th Regiment Missouri Infantry. Attached to Defences of Nashville and Northwestern Railroad, Department of the Cumberland, to August, 1864. Engineers Sherman's Army to July, 1865.


 * 1st Regiment Missouri Infantry (Union) Organized between 1 December 1861 and 21 March 1862 Mustered out between 21 December 1862 and 10 May 1862 Discharged between 29 December 1864 and 9 May 1865


 * 1st Regiment, Missouri Infantry (3 months 1861) (Union) Organized at St. Louis, Missouri, for three months April 22, 1861. Designation of Regiment changed to 1st Missouri Light Artillery September 1, 1861.
 * 1st Regiment, Missouri Infantry (African descent) (Union) Designation of Regiment changed to 62nd Regiment, United States Colored Infantry.


 * 1st Regiment, Missouri Light Artillery (Union) Batteries formed at various times between September 1, 1861 and June 1862. Served until various dates up to August 1865.


 * 1st Regiment, Missouri State Militia Cavalry (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Regiment, Missouri State Militia Infantry (Union) Organized at St. Louis, Missouri, May 13, 1862, by consolidation of various companies State Militia Infantry raised at St. Louis, Missouri. Served as prison guard and Provost guard at St. Louis until September 28, 1862.


 * 1st Regiment, Pioneers, Engineers and Mechanics, Missouri Home Guard (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 1st Regiment, US Reserve Corps, Missouri Infantry (Union) Organized at St. Louis, Missouri, September 3, 1861. Mustered out October 6, 1862.


 * 1st Regiment, US Reserve Corps, Missouri Infantry (3 months, 1861) (Union) Organized for three months at St. Louis, Mo., May 7, 1861. Mustered out August 20, 1861.


 * 1st Rifle Battalion, Missouri Infantry (Union) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.

-2nd Units

 * 2nd Battalion, Missouri State Militia Cavalry (Union) Organized at Harrisville and Kansas City, Missouri, March 17 to May 5, 1862.


 * 2nd Battalion, Enrolled Missouri Millitia, 6 months (Union) Was enrolled 1 October 1861.


 * 2nd Battery, Missouri State Militia Artillery (Union) Enrolled: between 26 February 1862 and 12 August 1862 Mustered: between 19 February 1862 and 29 April 1862 Discharged: between 8 September 1862 and 16 March 1863 Lieutenant Colonel: Arnold Krekel


 * 2nd Northeast Regiment, Missouri Home Guard (Union) Organized in Northern Missouri July, 1861. Consolidated with 1st Northeast Infantry and designated 21st Missouri Infantry December 31, 1861.


 * 2nd Provisional Regiment, Enrolled Missouri Militia (Union) Organized between 7 March 1863 and 25 April 1863. Mustered out between 15 March 1863 and 25 April 1863. Discharged between 30 June 1863 and 5 December 1863.


 * 2nd Regiment, Missouri Cavalry (Merrill's Horse) (Union) Organized at Benton Barracks, Missouri, by Captain Lewis Merrill, U. S. A., September 3 to December 11, 1861. (Co. "L" organized at St. Louis, Missouri, January 1, 1863, and Co. "M" at Warrenton June 30, 1863.)


 * 2nd Regiment, Missouri Infantry (Union) Organized between 24 June 1861 and 9 September 1861 Mustered out between 10 September 1861 and Discharged between 26 September 1864 and 29 September 1864


 * 2nd Regiment, Missouri Infantry (3 months, 1861) (Union) Organized at St. Louis, Missouri, April 22, 1861. Mustered out August 31, 1861.


 * 2nd Regiment, Missouri Infantry (African descent) (Union) Designation changed to 65th Regiment, United States Colored Infantry.


 * 2nd Regiment, Missouri Light Artillery (Union) Organized at St. Louis, Missouri, as 1st Regiment, Missouri Artillery, U. S. Reserve Corps, September 16 to November 6, 1861. Designation changed to 2nd Missouri Artillery November 20, 1861. Consolidated to a Battalion of 5 Companies September 29, 1863.


 * 2nd Regiment, Missouri State Militia Cavalry (Union) Organized in Missouri at large December, 1861, to April, 1862, and by consolidation of original 2nd and 11th Regiments, State Militia Cavalry.


 * 2nd Regiment, US Reserve Corps, Missouri Infantry Missouri (Union) Reorganized at St. Louis August 23 to September 20, 1861. Attached to District of St. Louis to October, 1861. 4th Division, Army of the Southwest, to May, 1862. 2nd Division, Army of the Mississippi, to June, 1862. 5th Division, Army of the Mississippi, to August.


 * 2nd Regiment, US Reserve Corps, Missouri Infantry (3 months, 1861) (Union) Organized *2nd Regiment, Enrolled Missouri Militia Cavalry (Union) Enrolled: 1 August 1861 Mustered: 3 September 1861 – 9 September 1861 Discharged: 19 September 1865 Colonel Lewis Merrill ed at St. Louis, Missouri, May 7, 1861. Mustered out August 16, 1861.


 * 2nd Regiment, Enrolled Missouri Militia (Union) Most of the companies enrolled and mustered in August or September 1862. Mustered out and discharged September to November 1864.


 * 2nd Regiment, Enrolled Missouri Militia Cavalry (Union) Enrolled: 1 August 1861 Mustered: 3 September 1861 – 9 September 1861 Discharged: 19 September 1865 Colonel Lewis Merrill

-3rd Units

 * 3rd Battalion, Enrolled Missouri Militia (Union) 3rd Battalion, Enrolled Missouri Militia was enrolled between 26 October 1861 and 26 October 1861.


 * 3rd Provisional Regiment, Enrolled Missouri Militia (Union) Organized between 14 April 1863 and 20 May 1863. Mustered out between 14 April 1863 and 20 May 1863. Discharged between 12 September 1863 and 9 December 1863.


 * 3rd Regiment, Missouri Cavalry (Union) Organized at Palmyra, Missouri, and St. Louis, Missouri, October 15, 1861, to March 6, 1862. At various locations. With Separate Cavalry Brigade, 7th Army Corps, to June, 1865.


 * 3rd Regiment, Missouri Infantry (Union) Organized between 27 July 1861 and 25 October 1861 Mustered out between 3 September 1861 and 31 December 1861 Discharged between 3 September 1864 and 16 November 1864


 * 3rd Regiment, Missouri Infantry (3 months, 1861) (Union) Organized at St. Louis, Missouri, April 22, 1861. Mustered out September 4, 1861.
 * 3rd Regiment, Missouri Infantry (African descent) (Union) Designation change to67th Regiment, United States Colored Infantry.


 * 3rd Regiment, Missouri State Militia Cavalry (1st Organization) (Union) Organized at Louisiana, Pike County, Missouri, May 5, 1862. Regiment disbanded February 4. 1863.


 * 3rd Regiment, Missouri State Militia Cavalry (2nd Organization) (Union) Reorganized from 10th Regiment State Militia Cavalry February 2, 1863. At various locations. With District of St. Louis, Missouri, Department of Missouri, to July, 1865.


 * 3rd Regiment, US Reserve Corps, Missouri Infantry (Union) Organized at St. Louis. Missouri, August and September, 1861. Consolidated with Gasconade Battalion to form 4th Missouri Infantry January 18, 1862.


 * 3rd Regiment, US Reserve Corps, Missouri Infantry (3 months 1861) (Union) Organized at Turner Hall, St. Louis, Missouri, May 8, 1861. Mustered out August 18, 1861.


 * 3rd Regiment, Enrolled Missouri Militia (Union) Enrolled in September 1862. Mustered out 25 September 1864 and discharged 3 November 1864.


 * 3rd Regiment, Enrolled Missouri Militia Cavalry (Union) Enrolled: 12 September 1861 – 20 February 1862 Mustered: 1 August 1861 – 19 September 1861 Discharged: 11 November 1864 – 27 July 1865 Colonel John M. Glover

-4th Units

 * 4th Provisional Regiment, Enrolled Missouri Militia (Union) Organized between 8 April 1863 and 17 June 1863. Mustered out between 18 April 1863 and 17 June 1863. Discharged between 1 October 1863 and 20 March 1865.


 * 4th Regiment, Missouri Cavalry (Union) Organized February, 1862, by consolidation of Fremont Hussars and three Companies Hollan Horse. Served in various locations, then at Department of Texas to November, 1865.


 * 4th Regiment, Missouri Infantry (Union) Organized at St. Louis, Missouri, by consolidation of Gasconade Battalion and 3rd Regiment United States Reserve Corps January, 1862. Mustered out February 1, 1863.


 * 4th Regiment, Missouri Infantry (3 months, 1861) (Union) Organized at St. Louis, Missouri, April 22, 1861. Mustered out July 30, 1861.
 * 4th Regiment, Missouri Infantry (African descent) (Union) Designation change to 68th Regiment, United States Colored Infantry.


 * 4th Regiment, Missouri State Militia Cavalry (Union) Organized at St. Joseph, Missouri, January 28 to May 14, 1862. Served in various locations, then at the District of Central Missouri, Department of Missouri, to July, 1865.


 * 4th Regiment, US Reserve Corps, Missouri Infantry (Union) Organized at St. Louis, Missouri, September, 1861. Mustered out January 13, 1862.


 * 4th Regiment, US Reserve Corps, Missouri Infantry (3 months, 1861) (Union) Organized at St. Louis, Missouri, May 8, 1861. Mustered out August 18, 1861.


 * 4th Regiment, Enrolled Missouri Militia (Union) 1st enrolled September 1862 and mustered in another two times. Discharged three times with the last discharge 3 November 1864.


 * 4th Regiment, Enrolled Missouri Militia Cavalry (Union) Enrolled: 25 July 1861 – 4 September 1861 Mustered: 27 August 1861 – 28 February 1862 Discharged: 18 October 1864 – 31 November 1865 Colonel George E. Waring Jr.